KIC 5950759: a high-amplitude δ Sct star with amplitude and frequency modulation near the terminal age main sequence

Article

Bowman, D. M., Hermans, J., Daszynska-Daszkiewicz, J., Holdsworth, D. L., Tkachenko, A., Murphy, S. J., Smalley, B. and Kurtz, D. W.. 2021. "KIC 5950759: a high-amplitude δ Sct star with amplitude and frequency modulation near the terminal age main sequence." Monthly Notices of the Royal Astronomical Society. 504 (3), pp. 4039-4053. https://doi.org/10.1093/mnras/stab1124
Article Title

KIC 5950759: a high-amplitude δ Sct star with amplitude and frequency modulation near the terminal age main sequence

ERA Journal ID1074
Article CategoryArticle
AuthorsBowman, D. M. (Author), Hermans, J. (Author), Daszynska-Daszkiewicz, J. (Author), Holdsworth, D. L. (Author), Tkachenko, A. (Author), Murphy, S. J. (Author), Smalley, B. (Author) and Kurtz, D. W. (Author)
Journal TitleMonthly Notices of the Royal Astronomical Society
Journal Citation504 (3), pp. 4039-4053
Number of Pages15
Year2021
PublisherOxford University Press
Place of PublicationUnited Kingdom
ISSN0035-8711
1365-2966
Digital Object Identifier (DOI)https://doi.org/10.1093/mnras/stab1124
Web Address (URL)https://academic.oup.com/mnras/article/504/3/4039/6244209
Abstract

Among the intermediate mass pulsating stars known as δ Sct stars is a subset of high-amplitude and predominantly radial-mode pulsators known as high-amplitude δ Sct (HADS) stars. From more than 2000 δ Sct stars observed by the Kepler space mission, only two HADS stars were detected. We investigate the more perplexing of these two HADS stars, KIC 5950759. We study its variability using ground- and space-based photometry, determine its atmospheric parameters from spectroscopy and perform asteroseismic modelling to constrain its mass and evolutionary stage. From spectroscopy, we find that KIC 5950759 is a metal-poor star, which is in agreement with the inferred metallicity needed to reproduce its pulsation mode frequencies from non-adiabatic pulsation models. Furthermore, we combine ground-based WASP and Kepler space photometry, and measure a linear change in period of order P˙/P≃10−6 yr−1 for both the fundamental and first overtone radial modes across a time base of several years, which is at least two orders of magnitude larger than predicted by evolution models, and is the largest measured period change in a δ Sct star to date. Our analysis indicates that KIC 5950759 is a metal-poor HADS star near the short-lived contraction phase and the terminal-age main sequence, with its sub-solar metallicity making it a candidate SX Phe star. KIC 5950759 is a unique object among the thousands of known δ Sct stars and warrants further study to ascertain why its pulsation modes are evolving remarkably faster than predicted by stellar evolution.

Keywordsasteroseismology; stars: individual: KIC 5950759; stars: oscillations; stars: variables: δ Scuti; Astrophysics - Solar and Stellar Astrophysics
ANZSRC Field of Research 2020510109. Stellar astronomy and planetary systems
Public Notes

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Byline AffiliationsCatholic University of Leuven, Belgium
University of Wroclaw, Poland
University of Central Lancashire, United Kingdom
University of Sydney
Keele University, United Kingdom
Institution of OriginUniversity of Southern Queensland
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Tidally trapped pulsations in a close binary star system discovered by TESS
Handler, G., Kurtz, D. W., Rappaport, S. A., Saio, H., Fuller, J., Jones, D., Guo, Z., Chowdhury, S., Sowicka, P., Alicavus, F. Kahraman, Streamer, M., Murphy, S. J., Gagliano, R., Jacobs, T. L. and Vanderburg, A.. 2020. "Tidally trapped pulsations in a close binary star system discovered by TESS." Nature Astronomy. 4 (7), pp. 684-689. https://doi.org/10.1038/s41550-020-1035-1
TOI-1259Ab – a gas giant planet with 2.7 per cent deep transits and a bound white dwarf companion
Martin, David V., El-Badry, Kareem, Hodzic, Vedad Kunovac, Triaud, Amaury H. M. J., Angus, Ruth, Birky, Jessica, Foreman-Mackey, Daniel, Hedges, Christina, Montet, Benjamin T., Murphy, Simon J., Santerne, Alexandre, Stassun, Keivan G., Stephan, Alexander P., Wang, Ji, Benni, Paul, Krushinsky, Vadim, Chazov, Nikita, Mishevskiy, Nikolay, Ziegler, Carl, ..., Winn, Joshua N.. 2021. "TOI-1259Ab – a gas giant planet with 2.7 per cent deep transits and a bound white dwarf companion." Monthly Notices of the Royal Astronomical Society. 507 (3), pp. 4132-4148. https://doi.org/10.1093/mnras/stab2129
Testing the intrinsic scatter of the asteroseismic scaling relations with Kepler red giants
Li, Yaguang, Bedding, Timothy R., Stello, Dennis, Sharma, Sanjib, Huber, Daniel and Murphy, Simon J.. 2021. "Testing the intrinsic scatter of the asteroseismic scaling relations with Kepler red giants." Monthly Notices of the Royal Astronomical Society. 501 (3), pp. 3162-3172. https://doi.org/10.1093/mnras/staa3932
TESS cycle 1 observations of roAp stars with 2-min cadence data
Holdsworth, D. L., Cunha, M. S., Kurtz, D. W., Antoci, V., Hey, D. R., Bowman, D. M., Kobzar, O., Buzasi, D. L., Kochukhov, O., Niemczura, E., Ozuyar, D., Shi, F., Szabo, R., Samadi-Ghadim, A., Bognar, Zs, Fox-Machado, L., Khalack, V., Lares-Martiz, M., Lovekin, C. C., ..., Vanderspek, R.. 2021. "TESS cycle 1 observations of roAp stars with 2-min cadence data." Monthly Notices of the Royal Astronomical Society. 506 (1), pp. 1073-1110. https://doi.org/10.1093/mnras/stab1578
Very regular high-frequency pulsation modes in young intermediate-mass stars
Bedding, Timothy R., Murphy, Simon J., Hey, Daniel R., Huber, Daniel, Li, Tanda, Smalley, Barry, Stello, Dennis, White, Timothy R., Ball, Warrick H., Chaplin, William J., Colman, Isabel L., Fuller, Jim, Gaidos, Eric, Harbeck, Daniel R., Hermes, J. J., Holdsworth, Daniel L., Li, Gang, Li, Yaguang, Mann, Andrew W., ..., Vanderspek, Roland K.. 2020. "Very regular high-frequency pulsation modes in young intermediate-mass stars." Nature. 581 (7807), pp. 147-151. https://doi.org/10.1038/s41586-020-2226-8
A precise asteroseismic age and metallicity for HD 139614: a pre-main-sequence star with a protoplanetary disc in Upper Centaurus–Lupus
Murphy, Simon J., Joyce, Meridith, Bedding, Timothy R., White, Timothy R. and Kama, Mihkel. 2021. "A precise asteroseismic age and metallicity for HD 139614: a pre-main-sequence star with a protoplanetary disc in Upper Centaurus–Lupus." Monthly Notices of the Royal Astronomical Society. 502 (2), pp. 1633-1646. https://doi.org/10.1093/mnras/stab144
A unicorn in monoceros: the 3 M⊙ dark companion to the bright, nearby red giant V723 Mon is a non-interacting, mass-gap black hole candidate
Jayasinghe, T., Stanek, K. Z., Thompson, Todd A., Kochanek, C. S., Rowan, D. M., Vallely, P. J., Strassmeier, K. G., Weber, M., Hinkle, J. T., Hambsch, F. -J., Martin, D. V., Prieto, J. L., Pessi, T., Huber, D., Auchettl, K., Lopez, L. A., Ilyin, I., Badenes, C., Howard, A. W., ..., Murphy, S. J.. 2021. "A unicorn in monoceros: the 3 M⊙ dark companion to the bright, nearby red giant V723 Mon is a non-interacting, mass-gap black hole candidate." Monthly Notices of the Royal Astronomical Society. 504 (2), pp. 2577-2602. https://doi.org/10.1093/mnras/stab907
Forward Modeling the Orbits of Companions to Pulsating Stars from Their Light Travel Time Variations
Hey, Daniel R., Murphy, Simon J., Foreman-Mackey, Daniel, Bedding, Timothy R., Pope, Benjamin J. S. and Hogg, David W.. 2020. "Forward Modeling the Orbits of Companions to Pulsating Stars from Their Light Travel Time Variations." The Astronomical Journal. 159 (5), pp. 1-11. https://doi.org/10.3847/1538-3881/ab7d38
A Search for Transits among the Delta Scuti Variables in Kepler
Hey, Daniel R., Montet, Benjamin T., Pope, Benjamin J. S., Murphy, Simon J. and Bedding, Timothy R.. 2021. "A Search for Transits among the Delta Scuti Variables in Kepler." The Astronomical Journal. 162 (5), p. 204. https://doi.org/10.3847/1538-3881/ac1b9b
A binary with a δ Scuti star and an oscillating red giant: orbit and asteroseismology of KIC 9773821
Murphy, Simon J., Li, Tanda, Sekaran, Sanjay, Bedding, Timothy R., Yu, Jie, Tkachenko, Andrew, Colman, Isabel, Huber, Daniel, Hey, Daniel, Baratashvili, Tinatin and Janssens, Soetkin. 2021. "A binary with a δ Scuti star and an oscillating red giant: orbit and asteroseismology of KIC 9773821." Monthly Notices of the Royal Astronomical Society. 505 (2), pp. 2336-2348. https://doi.org/10.1093/mnras/stab1436
Gaia-derived luminosities of Kepler A/F stars and the pulsator fraction across the δ Scuti instability strip
Murphy, Simon J., Hey, Daniel, Van Reeth, Timothy and Bedding, Timothy R.. 2019. "Gaia-derived luminosities of Kepler A/F stars and the pulsator fraction across the δ Scuti instability strip." Monthly Notices of the Royal Astronomical Society. 485 (2), pp. 2380-2400. https://doi.org/10.1093/mnras/stz590
A Dance with Dragons: TESS Reveals α Draconis is a Detached Eclipsing Binary
Bedding, Timothy R., Hey, Daniel R. and Murphy, Simon J.. 2019. "A Dance with Dragons: TESS Reveals α Draconis is a Detached Eclipsing Binary." Research Notes of the AAS. 3 (10), p. 163. https://doi.org/10.3847/2515-5172/ab5112
Asteroseismology of 16,000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii
Yu, Jie, Huber, Daniel, Bedding, Timothy R., Stello, Dennis, Hon, Marc, Murphy, Simon J. and Khanna, Shourya. 2018. "Asteroseismology of 16,000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii." Astrophysical Journal Supplement Series. 236 (2), pp. 42-59. https://doi.org/10.3847/1538-4365/aaaf74
Pulsating stars in binary systems : a review
Murphy, Simon J.. 2018. "Pulsating stars in binary systems : a review." PHOST - Physics of Oscillating Stars (2018). Banyuls-sur-mer (France) 02 - 07 Sep 2018
Period spacings of γ Doradus pulsators in the Kepler field: detection methods and application to 22 slow rotators
Li, Gang, Bedding, Timothy R., Murphy, Simon J., Van Reeth, Timothy, Antoci, Victoria and Ouazzani, Rhita-Maria. 2018. "Period spacings of γ Doradus pulsators in the Kepler field: detection methods and application to 22 slow rotators." Monthly Notices of the Royal Astronomical Society. 482 (2), pp. 1757-1785. https://doi.org/10.1093/mnras/sty2743
Asteroseismology of 1523 misclassified red giants using Kepler data
Yu, Jie, Huber, Daniel, Bedding, Timothy R., Stello, Dennis, Murphy, Simon J., Xiang, Maosheng, Bi, Shaolan and Li, Tanda. 2016. "Asteroseismology of 1523 misclassified red giants using Kepler data." Monthly Notices of the Royal Astronomical Society. 463 (2), pp. 1297-1306. https://doi.org/10.1093/mnras/stw2074
Spectroscopic and asteroseismic analysis of the remarkable main-sequence A star KIC 11145123
Takada-Hidai, Masahide, Kurtz, Donald W., Shibahashi, Hiromoto, Murphy, Simon J., Takata, Masao, Saio, Hideyuki and Sekii, Takashi. 2017. "Spectroscopic and asteroseismic analysis of the remarkable main-sequence A star KIC 11145123." Monthly Notices of the Royal Astronomical Society. 470 (4), pp. 4908-4924. https://doi.org/10.1093/mnras/stx1506
Pulsation versus metallicism in Am stars as revealed by LAMOST and WASP
Smalley, B., Antoci, V., Holdsworth, D. L., Kurtz, D. W., Murphy, S. J., De Cat, P., Anderson, D. R., Catanzaro, G., Collier Cameron, A., Hellier, C., Maxted, P. F. L., Norton, A. J., Pollacco, D., Ripepi, V., West, R. G. and Wheatley, P. J.. 2016. "Pulsation versus metallicism in Am stars as revealed by LAMOST and WASP." Monthly Notices of the Royal Astronomical Society. 465 (3), pp. 2662-2670. https://doi.org/10.1093/mnras/stw2903
Theory and evidence of global Rossby waves in upper main-sequence stars: r-mode oscillations in many Kepler stars
Saio, Hideyuki, Kurtz, Donald W., Murphy, Simon J., Antoci, Victoria L. and Lee, Umin. 2017. "Theory and evidence of global Rossby waves in upper main-sequence stars: r-mode oscillations in many Kepler stars." Monthly Notices of the Royal Astronomical Society. 474 (2), pp. 2774-2786. https://doi.org/10.1093/mnras/stx2962
A new asteroseismic diagnostic for internal rotation in γ Doradus stars
Ouazzani, Rhita-Maria, Salmon, S. J. A. J., Antoci, V., Bedding, T. R., Murphy, S. J. and Roxburgh, I. W.. 2016. "A new asteroseismic diagnostic for internal rotation in γ Doradus stars." Monthly Notices of the Royal Astronomical Society. 465 (2), pp. 2294-2309. https://doi.org/10.1093/mnras/stw2717
Spectroscopic survey of Kepler stars – II. FIES/NOT observations of A- and F-type stars
Niemczura, E., Polinska, M., Murphy, S. J., Smalley, B., Kolaczkowski, Z., Jessen-Hansen, J., Uytterhoeven, K., Lykke, J. M., Trivino Hage, A. and Michalska, G.. 2017. "Spectroscopic survey of Kepler stars – II. FIES/NOT observations of A- and F-type stars." Monthly Notices of the Royal Astronomical Society. 470 (3), pp. 2870-2889. https://doi.org/10.1093/mnras/stx1256
Metal-rich SX Phe stars in the Kepler field
Nemec, James M., Balona, Luis A., Murphy, Simon J., Kinemuchi, Karen and Jeon, Young-Beom. 2016. "Metal-rich SX Phe stars in the Kepler field." Monthly Notices of the Royal Astronomical Society. 466 (2), pp. 1290-1329. https://doi.org/10.1093/mnras/stw3072
Finding binaries from phase modulation of pulsating stars with Kepler – IV. Detection limits and radial velocity verification
Murphy, Simon J., Shibahashi, Hiromoto and Bedding, Timothy R.. 2016. "Finding binaries from phase modulation of pulsating stars with Kepler – IV. Detection limits and radial velocity verification." Monthly Notices of the Royal Astronomical Society. 461 (4), pp. 4215-4226. https://doi.org/10.1093/mnras/stw1622
Gaia's view of the λ Boo star puzzle
Murphy, Simon J. and Paunzen, Ernst. 2016. "Gaia's view of the λ Boo star puzzle." Monthly Notices of the Royal Astronomical Society. 466 (1), pp. 546-555. https://doi.org/10.1093/mnras/stw3141
Near-uniform internal rotation of the main-sequence γ Doradus pulsator KIC 7661054
Murphy, Simon J., Fossati, Luca, Bedding, Timothy R., Saio, Hideyuki, Kurtz, Donald W., Grassitelli, Luca and Wang, Edric S.. 2016. "Near-uniform internal rotation of the main-sequence γ Doradus pulsator KIC 7661054." Monthly Notices of the Royal Astronomical Society. 459 (2), pp. 1201-1212. https://doi.org/10.1093/mnras/stw705
A Planet in an 840 Day Orbit around a Kepler Main-sequence A Star Found from Phase Modulation of Its Pulsations
Murphy, Simon J., Bedding, Timothy R. and Shibahashi, Hiromoto. 2016. "A Planet in an 840 Day Orbit around a Kepler Main-sequence A Star Found from Phase Modulation of Its Pulsations." The Astrophysical Journal Letters. 827 (1), pp. 1-4. https://doi.org/10.3847/2041-8205/827/1/L17
Modelling Kepler red giants in eclipsing binaries: calibrating the mixing-length parameter with asteroseismology
Li, Tanda, Bedding, Timothy R., Huber, Daniel, Ball, Warrick H., Stello, Dennis, Murphy, Simon J. and Bland-Hawthorn, Joss. 2017. "Modelling Kepler red giants in eclipsing binaries: calibrating the mixing-length parameter with asteroseismology." Monthly Notices of the Royal Astronomical Society. 475 (1), pp. 981-998. https://doi.org/10.1093/mnras/stx3079
HD 24355 observed by the Kepler K2 mission: a rapidly oscillating Ap star pulsating in a distorted quadrupole mode
Holdsworth, Daniel L., Kurtz, Donald W., Smalley, Barry, Saio, Hideyuki, Handler, Gerald, Murphy, Simon J. and Lehmann, Holger. 2016. "HD 24355 observed by the Kepler K2 mission: a rapidly oscillating Ap star pulsating in a distorted quadrupole mode." Monthly Notices of the Royal Astronomical Society. 462 (1), pp. 876-892. https://doi.org/10.1093/mnras/stw1711
KIC 3749404: a heartbeat star with rapid apsidal advance indicative of a tertiary component
Hambleton, K., Kurtz, D. W., Prsa, A., Quinn, S. N., Fuller, J., Murphy, S. J., Thompson, S. E., Latham, D. W. and Shporer, A.. 2016. "KIC 3749404: a heartbeat star with rapid apsidal advance indicative of a tertiary component." Monthly Notices of the Royal Astronomical Society. 463 (2), pp. 1199-1212. https://doi.org/10.1093/mnras/stw1970
KIC 8164262: a heartbeat star showing tidally induced pulsations with resonant locking
Hambleton, K., Fuller, J., Thompson, S., Prsa, A., Kurtz, D. W., Shporer, A., Isaacson, H., Howard, A. W., Endl, M., Cochran, W. and Murphy, S. J.. 2017. "KIC 8164262: a heartbeat star showing tidally induced pulsations with resonant locking." Monthly Notices of the Royal Astronomical Society. 473 (4), pp. 5165-5176. https://doi.org/10.1093/mnras/stx2673
Detection of Solar-like Oscillations, Observational Constraints, and Stellar Models for θ Cyg, the Brightest Star Observed By the Kepler Mission
Guzik, J. A., Houdek, G., Chaplin, W. J., Smalley, B., Kurtz, D. W., Gilliland, R. L., Mullally, F., Rowe, J. F., Bryson, S. T., Still, M. D., Antoci, V., Appourchaux, T., Basu, S., Bedding, T. R., Benomar, O., Garcia, R. A., Huber, D., Kjeldsen, H., Latham, D. W., ..., Uytterhoeven, K.. 2016. "Detection of Solar-like Oscillations, Observational Constraints, and Stellar Models for θ Cyg, the Brightest Star Observed By the Kepler Mission." The Astrophysical Journal: an international review of astronomy and astronomical physics. 831 (1), pp. 171-22. https://doi.org/10.3847/0004-637X/831/1/17
Large amplitude change in spot-induced rotational modulation of the Kepler Ap star KIC 2569073
Drury, Jason A., Murphy, Simon J., Derekas, Aliz, Sodor, Adam, Stello, Dennis, Kuehn, Charles A., Bedding, Timothy R., Bognar, Zsofia, Szigeti, Laszlo, Szakats, Robert, Sarneczky, Krisztian and Molnar, Laszlo. 2017. "Large amplitude change in spot-induced rotational modulation of the Kepler Ap star KIC 2569073." Monthly Notices of the Royal Astronomical Society. 471 (3), pp. 3193-3199. https://doi.org/10.1093/mnras/stx1722
Binary star detectability in Kepler data from phase modulation of different types of oscillations
Compton, D. L., Bedding, T. R., Murphy, S. J. and Stello, D.. 2016. "Binary star detectability in Kepler data from phase modulation of different types of oscillations." Monthly Notices of the Royal Astronomical Society. 461 (2), pp. 1943-1949. https://doi.org/10.1093/mnras/stw1092
Amplitude modulation in δ Sct stars: statistics from an ensemble study of Kepler targets
Bowman, Dominic M., Kurtz, Donald W., Breger, Michel, Murphy, Simon J. and Holdsworth, Daniel L.. 2016. "Amplitude modulation in δ Sct stars: statistics from an ensemble study of Kepler targets." Monthly Notices of the Royal Astronomical Society. 460 (2), pp. 1970-1989. https://doi.org/10.1093/mnras/stw1153
Investigating the A-Type Stars Using Kepler Data
Murphy, Simon J.. 2013. Investigating the A-Type Stars Using Kepler Data. PhD Thesis Doctor of Philosophy. University of Central Lancashire.
Beyond the Kepler/K2 bright limit: variability in the seven brightest members of the Pleiades
White, T. R., Pope, B. J. S., Antoci, V., Papics, P. I., Aerts, C., Gies, D. R., Gordon, K., Huber, D., Schaefer, G. H., Aigrain, S., Albrecht, S., Barclay, T., Barentsen, G., Beck, P. G., Bedding, T. R., Andersen, M. Fredslund, Grundahl, F., Howell, S. B., Ireland, M. J., ..., Tuthill, P. G.. 2017. "Beyond the Kepler/K2 bright limit: variability in the seven brightest members of the Pleiades." Monthly Notices of the Royal Astronomical Society. 471 (3), pp. 2882-2901. https://doi.org/10.1093/mnras/stx1050
A window into δ Sct stellar interiors: understanding the eclipsing binary system TT Hor
Streamer, Margaret, Ireland, Michael J., Murphy, Simon J. and Bento, Joao. 2018. "A window into δ Sct stellar interiors: understanding the eclipsing binary system TT Hor." Monthly Notices of the Royal Astronomical Society. 480 (1), pp. 1372-1383. https://doi.org/10.1093/mnras/sty1881
An astrophysical interpretation of the remarkable g-mode frequency groups of the rapidly rotating γ Dor star, KIC 5608334
Saio, Hideyuki, Bedding, Timothy R., Kurtz, Donald W., Murphy, Simon J., Antoci, Victoria, Shibahashi, Hiromoto, Li, Gang and Takata, Masao. 2018. "An astrophysical interpretation of the remarkable g-mode frequency groups of the rapidly rotating γ Dor star, KIC 5608334." Monthly Notices of the Royal Astronomical Society. 477 (2), pp. 2183-2195. https://doi.org/10.1093/mnras/sty784
Finding binaries from phase modulation of pulsating stars with Kepler: V. Orbital parameters, with eccentricity and mass-ratio distributions of 341 new binaries
Murphy, Simon J., Moe, Maxwell, Kurtz, Donald W., Bedding, Timothy R., Shibahashi, Hiromoto and Boffin, Henri M. J.. 2017. "Finding binaries from phase modulation of pulsating stars with Kepler: V. Orbital parameters, with eccentricity and mass-ratio distributions of 341 new binaries." Monthly Notices of the Royal Astronomical Society. 474 (4), pp. 4322-4346. https://doi.org/10.1093/mnras/stx3049
Asteroseismology of KIC 7107778: a binary comprising almost identical subgiants
Li, Yaguang, Bedding, Timothy R., Li, Tanda, Bi, Shaolan, Murphy, Simon J., Corsaro, Enrico, Chen, Li and Tian, Zhijia. 2018. "Asteroseismology of KIC 7107778: a binary comprising almost identical subgiants." Monthly Notices of the Royal Astronomical Society. 476 (1), pp. 470-481. https://doi.org/10.1093/mnras/sty222
A spectroscopic and photometric investigation of the mercury–manganese star KIC 6128830
Hummerich, Stefan, Niemczura, Ewa, Walczak, Przemysław, Paunzen, Ernst, Bernhard, Klaus, Murphy, Simon J. and Drobek, Dominik. 2017. "A spectroscopic and photometric investigation of the mercury–manganese star KIC 6128830." Monthly Notices of the Royal Astronomical Society. 474 (2), pp. 2467-2478. https://doi.org/10.1093/mnras/stx2974
An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue
Murphy, Simon J., Corbally, Christopher J., Gray, Richard O., Cheng, Kwang-Ping, Neff, James E., Koen, Chris, Kuehn, Charles A., Newsome, Ian and Riggs, Quinlin. 2015. "An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue." Publications of the Astronomical Society of Australia. 32, pp. 1-43. https://doi.org/10.1017/pasa.2015.34
Echelle diagrams and period spacings of g modes in γ Doradus stars from four years of Kepler observations
Bedding, Timothy R., Murphy, Simon J., Colman, Isabel L. and Kurtz, Donald W.. 2015. "Echelle diagrams and period spacings of g modes in γ Doradus stars from four years of Kepler observations." Garcia, R. A. and Ballot, J. (ed.) EPJ Web of Conferences: Space Photometry Revolution – CoRoT Symposium 3 (2015). Toulouse, France 06 - 11 Jul 2014 France. https://doi.org/10.1051/epjconf/201510101005
Kepler Fourier concepts: The performance of the Kepler data pipeline
Murphy, S. J.. 2012. "Kepler Fourier concepts: The performance of the Kepler data pipeline." Astronomische Nachrichten. 333 (10), pp. 1057-1060. https://doi.org/10.1002/asna.201211804
WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly rotating F1V star
Temple, L. Y., Hellier, C., Albrow, M. D., Anderson, D. R., Bayliss, D., Beatty, T. G., Bieryla, A., Brown, D. J. A., Cargile, P. A., Collier Cameron, A., Collins, K. A., Colon, K. D., Curtis, I. A., D'Ago, G., Delrez, L., Eastman, J., Gaudi, B. S., Gillon, M., Gregorio, J., ..., Zhou, G.. 2017. "WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly rotating F1V star." Monthly Notices of the Royal Astronomical Society. 471 (3), pp. 2743-2752. https://doi.org/10.1093/mnras/stx1729
The ANU WiFeS SuperNovA Programme (AWSNAP)
Childress, Michael J., Tucker, Brad E., Yuan, Fang, Scalzo, Richard, Ruiter, Ashley, Seitenzahl, Ivo, Zhang, Bonnie, Schmidt, Brian, Anguiano, Borja, Aniyan, Suryashree, Bayliss, Daniel D. R., Bento, Joao, Bessell, Michael, Bian, Fuyan, Davies, Rebecca, Dopita, Michael, Fogarty, Lisa, Fraser-McKelvie, Amelia, Freeman, Ken, ..., Zhou, George. 2016. "The ANU WiFeS SuperNovA Programme (AWSNAP)." Publications of the Astronomical Society of Australia. 33, pp. 1-29. https://doi.org/10.1017/pasa.2016.47
maelstrom: Forward modeling of pulsating stars in binaries
Hey, Daniel R., Murphy, Simon J., Foreman-Mackey, Dan, Bedding, Timothy R., Pope, Benjamin J.S. and Hogg, David W.. 2022. maelstrom: Forward modeling of pulsating stars in binaries . Astrophysics Source Code Library.
Discovery of post-mass-transfer helium-burning red giants using asteroseismology
Li, Yaguang, Bedding, Timothy R., Murphy, Simon J., Stello, Dennis, Chen, Yifan, Huber, Daniel, Joyce, Meridith, Marks, Dion, Zhang, Xianfei, Bi, Shaolan, Colman, Isabel L., Hayden, Michael R., Hey, Daniel R., Li, Gang, Montet, Benjamin T., Sharma, Sanjib and Wu, Yaqian. 2022. "Discovery of post-mass-transfer helium-burning red giants using asteroseismology ." Nature Astronomy. 6, pp. 673-680. https://doi.org/10.1038/s41550-022-01648-5
Classifying Kepler light curves for 12 000 A and F stars using supervised feature-based machine learning
Barbara, Nicholas H., Bedding, Timothy R., Fulcher, Ben D., Murphy, Simon J. and Van Reeth, Timothy. 2022. "Classifying Kepler light curves for 12 000 A and F stars using supervised feature-based machine learning ." Monthly Notices of the Royal Astronomical Society. 514 (2), pp. 2793-280. https://doi.org/10.1093/mnras/stac1515
KIC 3440495: A Rapidly Rotating δ Scuti-γ Doradus Hybrid Pulsator in a Binary System
Ma, Shuguo, Esamdin, Ali, Hernández, Antonio García, Murphy, Simon J., Lv, Chenglong, Wei, Peng, Rieutord, Michel, Pascual-Granado, Javier, Dang, Fei, Niu, Hubiao, Yang, TaoZhi, Feng, Guojie, Karimov, Rivkat and Tillayev, Yusuf. 2022. "KIC 3440495: A Rapidly Rotating δ Scuti-γ Doradus Hybrid Pulsator in a Binary System ." The Astrophysical Journal: an international review of astronomy and astronomical physics. 937 (2). https://doi.org/10.3847/1538-4357/ac8c30
SPYGLASS. III. The Fornax-Horologium Association and Its Traceback History within the Austral Complex
Kerr, Ronan, Kraus, Kraus, Murphy, Simon, Krolikowski, Daniel M., Bedding, Timothy R. and Rizzuto, Aaron C.. 2022. "SPYGLASS. III. The Fornax-Horologium Association and Its Traceback History within the Austral Complex." The Astrophysical Journal: an international review of astronomy and astronomical physics. 941 (2). https://doi.org/10.3847/1538-4357/aca0dd
SPYGLASS. II. The Multigenerational and Multiorigin Star Formation History of Cepheus Far North
Kerr, Ronan, Kraus, Adam L., Murphy, Simon J., Krolikowski, Daniel M., Offner, Stella S. R., Tofflemire, Benjamin M. and Rizzuto, Aaron C.. 2022. "SPYGLASS. II. The Multigenerational and Multiorigin Star Formation History of Cepheus Far North ." The Astrophysical Journal: an international review of astronomy and astronomical physics. 941 (1). https://doi.org/10.3847/1538-4357/ac9b45
Revisiting bright δ Scuti stars and their period–luminosity relation with TESS and Gaia DR3
Barac, Natascha, Bedding, Timothy R., Murphy, Simon J. and Hey, Daniel R.. 2022. "Revisiting bright δ Scuti stars and their period–luminosity relation with TESS and Gaia DR3." Monthly Notices of the Royal Astronomical Society. 516 (2), pp. 2080-2094. https://doi.org/10.1093/mnras/stac2132
TIC 5724661: A Long-period Binary with a Pulsating sdB Star and δ Scuti Variable
Jayaraman, Rahul, Rappaport, Saul, Nelson, Lorne, Kurtz, Donald W., Dufresne, George, Handler, Gerald, Senhadji, Abdel, Latham, David W., Zhou, George, Bieryla, Allyson and Ricker, George R.. 2022. "TIC 5724661: A Long-period Binary with a Pulsating sdB Star and δ Scuti Variable." The Astrophysical Journal: an international review of astronomy and astronomical physics. 936 (2), pp. 1-14. https://doi.org/10.3847/1538-4357/ac84d0
Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843
Eisner, N. L., Nicholson, B. A., Barragan, O., Aigrain, S., Lintott, C., Kaye, L., Klein, B., Miller, G., Taylor, J., Zicher, N., Buchhave, L. A., Caldwell, D. A., Horner, J., Llama, J., Mortier, A., Rajpaul, V. M., Stassun, K., Sporer, A., Tkachenko, A., ..., Wilson, G. M.. 2021. "Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843." Monthly Notices of the Royal Astronomical Society. 505 (2), pp. 1827-1840. https://doi.org/10.1093/mnras/stab1253
KIC 4768731: a bright long-period roAp star in the Kepler field
Smalley, B., Niemczura, E., Murphy, S. J., Lehmann, H., Kurtz, D. W., Holdsworth, D. L., Cunha, M. S., Balona, L. A., Briquet, M., Bruntt, H., De Cat, P., Lampens, P., Thygesen, A. O. and Uytterhoeven, K.. 2015. "KIC 4768731: a bright long-period roAp star in the Kepler field." Monthly Notices of the Royal Astronomical Society. 452 (4), pp. 3334-3345. https://doi.org/10.1093/mnras/stv1515
FM stars II: a Fourier view of pulsating binary stars – determining binary orbital parameters photometrically for highly eccentric cases
Shibahashi, Hiromoto, Kurtz, Donald W. and Murphy, Simon J.. 2015. "FM stars II: a Fourier view of pulsating binary stars – determining binary orbital parameters photometrically for highly eccentric cases." Monthly Notices of the Royal Astronomical Society. 450 (4), pp. 3999-4015. https://doi.org/10.1093/mnras/stv875
KIC 10080943: An eccentric binary system containing two pressure- and gravity-mode hybrid pulsators
Schmid, V. S., Tkachenko, A., Aerts, C., Degroote, P., Bloemen, S., Murphy, S. J., Van Reeth, T., Papics, P. I., Bedding, T. R., Keen, M. A., Prsa, A., Menu, J., Debosscher, J., Hrudkova, M., De Smedt, K., Lombaert, R. and Nemeth, P.. 2015. "KIC 10080943: An eccentric binary system containing two pressure- and gravity-mode hybrid pulsators." Astronomy and Astrophysics: a European journal. 584, pp. 1-22. https://doi.org/10.1051/0004-6361/201526945
Asteroseismic measurement of slow, nearly uniform surface-to-core rotation in the main-sequence F star KIC 9244992
Saio, Hideyuki, Kurtz, Donald W., Takata, Masao, Shibahashi, Hiromoto, Murphy, Simon J., Sekii, Takashi and Bedding, Timothy R.. 2015. "Asteroseismic measurement of slow, nearly uniform surface-to-core rotation in the main-sequence F star KIC 9244992." Monthly Notices of the Royal Astronomical Society. 447 (4), pp. 3264-3277. https://doi.org/10.1093/mnras/stu2696
Photometry of very bright stars with Kepler and K2 smear data
Pope, B. J. S., White, T. R., Huber, D., Murphy, S. J., Bedding, T. R., Caldwell, D. A., Sarai, A., Aigrain, S. and Barclay, T.. 2015. "Photometry of very bright stars with Kepler and K2 smear data." Monthly Notices of the Royal Astronomical Society. 455 (1), pp. L36-L40. https://doi.org/10.1093/mnrasl/slv143
Spectroscopic survey of Kepler stars. I. HERMES/Mercator observations of A- and F-type stars
Niemczura, E., Murphy, S. J., Smalley, B., Uytterhoeven, K., Pigulski, A., Lehmann, H., Bowman, D. M., Catanzaro, G., van Aarle, E., Bloemen, S., Briquet, M., De Cat, P., Drobek, D., Eyer, L., Gameiro, J. F. S., Gorlova, N., Kaminski, K., Lampens, P., Marcos-Arenal, P., ..., Fagas, M.. 2015. "Spectroscopic survey of Kepler stars. I. HERMES/Mercator observations of A- and F-type stars." Monthly Notices of the Royal Astronomical Society. 450 (3), pp. 2764-2783. https://doi.org/10.1093/mnras/stv528
Deriving the orbital properties of pulsators in binary systems through their light arrival time delays
Murphy, Simon J. and Shibahashi, Hiromoto. 2015. "Deriving the orbital properties of pulsators in binary systems through their light arrival time delays." Monthly Notices of the Royal Astronomical Society. 450 (4), pp. 4475-4485. https://doi.org/10.1093/mnras/stv884
A search for non-pulsating, chemically normal stars in the δ Scuti instability strip using Kepler data
Murphy, Simon J., Bedding, Timothy R., Niemczura, Ewa, Kurtz, Donald W. and Smalley, Barry. 2015. "A search for non-pulsating, chemically normal stars in the δ Scuti instability strip using Kepler data." Monthly Notices of the Royal Astronomical Society. 447 (4), pp. 3948-3959. https://doi.org/10.1093/mnras/stu2749
The potential for super-Nyquist asteroseismology with TESS
Murphy, Simon J.. 2015. "The potential for super-Nyquist asteroseismology with TESS." Monthly Notices of the Royal Astronomical Society. 453 (3), pp. 2569-2575. https://doi.org/10.1093/mnras/stv1842
A unifying explanation of complex frequency spectra of γ Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves
Kurtz, Donald W., Shibahashi, Hiromoto, Murphy, Simon J., Bedding, Timothy R. and Bowman, Dominic M.. 2015. "A unifying explanation of complex frequency spectra of γ Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves." Monthly Notices of the Royal Astronomical Society. 450 (3), pp. 3015-3029. https://doi.org/10.1093/mnras/stv868
KIC 10080943: a binary star with two γ Doradus/δ Scuti hybrid pulsators. Analysis of the g modes
Keen, M. A., Bedding, T. R., Murphy, S. J., Schmid, V. S., Aerts, C., Tkachenko, A., Ouazzani, R. M. and Kurtz, D. W.. 2015. "KIC 10080943: a binary star with two γ Doradus/δ Scuti hybrid pulsators. Analysis of the g modes." Monthly Notices of the Royal Astronomical Society. 454 (2), pp. 1792-1797. https://doi.org/10.1093/mnras/stv2107
A 0.24+0.18 M double-lined eclipsing binary from the HATSouth survey
Zhou, G., Bayliss, D., Hartman, J. D., Rabus, M., Bakos, G. A., Jordan, A., Brahm, R., Penev, K., Csubry, Z., Mancini, L., Espinoza, N., de Val-Borro, M., Bhatti, W., Ciceri, S., Henning, T., Schmidt, B., Murphy, S. J., Butler, R. P., Arriagada, P., ..., Noyes, R. W.. 2015. "A 0.24+0.18 M double-lined eclipsing binary from the HATSouth survey." Monthly Notices of the Royal Astronomical Society. 451 (3), pp. 2263-2277. https://doi.org/10.1093/mnras/stv1070
Finding binaries among Kepler pulsating stars from phase modulation of their pulsations
Murphy, Simon J., Bedding, Timothy R., Shibahashi, Hiromoto, Kurtz, Donald W. and Kjeldsen, Hans. 2014. "Finding binaries among Kepler pulsating stars from phase modulation of their pulsations." Monthly Notices of the Royal Astronomical Society. 441 (3), pp. 2515-2527. https://doi.org/10.1093/mnras/stu765
Asteroseismic measurement of surface-to-core rotation in a main-sequence A star, KIC 11145123
Kurtz, Donald W., Saio, Hideyuki, Takata, Masao, Shibahashi, Hiromoto, Murphy, Simon J. and Sekii, Takashi. 2014. "Asteroseismic measurement of surface-to-core rotation in a main-sequence A star, KIC 11145123." Monthly Notices of the Royal Astronomical Society. 444 (1), pp. 102-116. https://doi.org/10.1093/mnras/stu1329
Validation of the frequency modulation technique applied to the pulsating δ Sct–γ Dor eclipsing binary star KIC 8569819
Kurtz, Donald W., Hambleton, Kelly M., Shibahashi, Hiromoto, Murphy, Simon J. and Prsa, Andrej. 2014. "Validation of the frequency modulation technique applied to the pulsating δ Sct–γ Dor eclipsing binary star KIC 8569819." Monthly Notices of the Royal Astronomical Society. 446 (2), pp. 1223-1233. https://doi.org/10.1093/mnras/stu2075
The role of turbulent pressure as a coherent pulsational driving mechanism: The case of the δ SCUTI STAR HD 187547
Antoci, V., Cunha, M., Houdek, G., Kjeldsen, H., Trampedach, R., Handler, G., Luftinger, T., Arentoft, T. and Murphy, S.. 2014. "The role of turbulent pressure as a coherent pulsational driving mechanism: The case of the δ SCUTI STAR HD 187547." The Astrophysical Journal: an international review of astronomy and astronomical physics. 796 (2), pp. 1-8. https://doi.org/10.1088/0004-637X/796/2/118
Evolution from protoplanetary to debris discs: the transition disc around HD 166191
Kennedy, G. M., Murphy, S. J., Lisse, C. M., Menard, F., Sitko, M. L., Wyatt, M. C., Bayliss, D. D. R., DeMeo, F. E., Crawford, K. B., Kim, D. L., Rudy, R. J., Russell, R. W., Sibthorpe, B., Skinner, M. A. and Zhou, G.. 2014. "Evolution from protoplanetary to debris discs: the transition disc around HD 166191." Monthly Notices of the Royal Astronomical Society. 438 (4), pp. 3299-3309. https://doi.org/10.1093/mnras/stt2435
Super-Nyquist asteroseismology with the Kepler Space Telescope
Murphy, Simon J., Shibahashi, Hiromoto and Kurtz, Donald W.. 2013. "Super-Nyquist asteroseismology with the Kepler Space Telescope." Monthly Notices of the Royal Astronomical Society. 430 (4), pp. 2986-2998. https://doi.org/10.1093/mnras/stt105
Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system
Murphy, S. J., Pigulski, A., Kurtz, D. W., Suarez, J. C., Handler, G., Balona, L. A., Smalley, B., Uytterhoeven, K., Szabo, R., Thygesen, A. O., Elkin, V., Breger, M., Grigahcene, A., Guzik, J. A., Nemec, J. M. and Southworth, J.. 2013. "Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system." Monthly Notices of the Royal Astronomical Society. 432 (3), pp. 2284-2297. https://doi.org/10.1093/mnras/stt587
Erratum: Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system
Murphy, S. J., Pigulski, A., Kurtz, D. W., Suarez, J. C., Handler, G., Balona, L. A., Smalley, B., Uytterhoeven, K., Szabo, R., Thygesen, A. O., Elkin, V., Breger, M., Grigahcene, A., Guzik, J. A., Nemec, J. M. and Southworth, J.. 2013. "Erratum: Asteroseismology of KIC 11754974: a high-amplitude SX Phe pulsator in a 343-d binary system." Monthly Notices of the Royal Astronomical Society. 436 (3), pp. 2877-2877. https://doi.org/10.1093/mnras/stt1749
Pulsational amplitude growth of the star KIC 3429637 (HD 178875) in the context of Am and ρ Pup stars
Murphy, Simon J., Grigahcene, A., Niemczura, E., Kurtz, D. W. and Uytterhoeven, K.. 2012. "Pulsational amplitude growth of the star KIC 3429637 (HD 178875) in the context of Am and ρ Pup stars." Monthly Notices of the Royal Astronomical Society. 427 (2), pp. 1418-1428. https://doi.org/10.1111/j.1365-2966.2012.22062.x
An examination of some characteristics of Kepler short- and long-cadence data
Murphy, Simon J.. 2012. "An examination of some characteristics of Kepler short- and long-cadence data." Monthly Notices of the Royal Astronomical Society. 422 (1), pp. 665-671. https://doi.org/10.1111/j.1365-2966.2012.20644.x
Unusual high-frequency oscillations in the Kepler δ Scuti star KIC 4840675
Balona, L. A., Breger, M., Catanzaro, G., Cunha, M. S., Handler, G., Kolaczkowski, Z., Kurtz, D. W., Murphy, S., Niemczura, E., Paparo, M., Smalley, B., Szabo, R., Uytterhoeven, K., Christiansen, J. L., Uddin, K. and Stumpe, M. C.. 2012. "Unusual high-frequency oscillations in the Kepler δ Scuti star KIC 4840675." Monthly Notices of the Royal Astronomical Society. 424 (2), pp. 1187-1196. https://doi.org/10.1111/j.1365-2966.2012.21295.x
The Kepler characterization of the variability among A- and F-type stars I. General overview
Uytterhoeven, K., Moya, A., Grigahcene, A., Guzik, J. A., Gutierrez-Soto, J., Smalley, B., Handler, G., Balona, L. A., Niemczura, E., Fox Machado, L., Benatti, S., Chapellier, E., Tkachenko, A., Szabo, R., Suarez, J. C., Ripepi, V., Pascual, J., Mathias, P., Martin-Ruiz, S., ..., Van Cleve, J.. 2011. "The Kepler characterization of the variability among A- and F-type stars I. General overview." Astronomy and Astrophysics: a European journal. 534. https://doi.org/10.1051/0004-6361/201117368