TESS cycle 1 observations of roAp stars with 2-min cadence data
Article
Article Title | TESS cycle 1 observations of roAp stars with 2-min cadence data |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Holdsworth, D. L. (Author), Cunha, M. S. (Author), Kurtz, D. W. (Author), Antoci, V. (Author), Hey, D. R. (Author), Bowman, D. M. (Author), Kobzar, O. (Author), Buzasi, D. L. (Author), Kochukhov, O. (Author), Niemczura, E. (Author), Ozuyar, D. (Author), Shi, F. (Author), Szabo, R. (Author), Samadi-Ghadim, A. (Author), Bognar, Zs (Author), Fox-Machado, L. (Author), Khalack, V. (Author), Lares-Martiz, M. (Author), Lovekin, C. C. (Author), Mikolajczyk, P. (Author), Mkrtichian, D. (Author), Pascual-Granado, J. (Author), Paunzen, E. (Author), Richey-Yowell, T. (Author), Sodor, Á (Author), Sikora, J. (Author), Yang, T. Z. (Author), Brunsden, E. (Author), David-Uraz, A. (Author), Derekas, A. (Author), Garcia Hernandez, A. (Author), Guzik, J. A. (Author), Hatamkhani, N. (Author), Handberg, R. (Author), Lambert, T. S. (Author), Lampens, P. (Author), Murphy, S. J. (Author), Monier, R. (Author), Pollard, K. R. (Author), Quitral-Manosalva, P. (Author), Ramon-Ballesta, A. (Author), Smalley, B. (Author), Stateva, I. (Author) and Vanderspek, R. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 506 (1), pp. 1073-1110 |
Number of Pages | 38 |
Year | 2021 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab1578 |
Web Address (URL) | https://academic.oup.com/mnras/article/506/1/1073/6289936 |
Abstract | We present the results of a systematic search for new rapidly oscillating Ap (roAp) stars using the 2-min cadence data collected by the Transiting Exoplanet Survey Satellite (TESS) during its Cycle 1 observations. We identify 12 new roAp stars. Amongst these stars we discover the roAp star with the longest pulsation period, another with the shortest rotation period, and six with multiperiodic variability. In addition to these new roAp stars, we present an analysis of 44 known roAp stars observed by TESS during Cycle 1, providing the first high-precision and homogeneous sample of a significant fraction of the known roAp stars. The TESS observations have shown that almost 60 per cent (33) of our sample of stars are multiperiodic, providing excellent cases to test models of roAp pulsations, and from which the most rewarding asteroseismic results can be gleaned. We report four cases of the occurrence of rotationally split frequency multiplets that imply different mode geometries for the same degree modes in the same star. This provides a conundrum in applying the oblique pulsator model to the roAp stars. Finally, we report the discovery of non-linear mode interactions in α Cir (TIC 402546736, HD 128898) around the harmonic of the principal mode – this is only the second case of such a phenomenon. |
Keywords | asteroseismology; stars: chemically peculiar; stars: magnetic field; stars: oscillations; stars: variables; techniques: photometric; Astrophysics - Solar and Stellar Astrophysics |
ANZSRC Field of Research 2020 | 510109. 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 Affiliations | University of Central Lancashire, United Kingdom |
University of Porto, Portugal | |
Technical University of Denmark, Denmark | |
Aarhus University, Denmark | |
Catholic University of Leuven, Belgium | |
University of Moncton, Canada | |
Florida Gulf Coast University, United States | |
Uppsala University, Sweden | |
Wroclaw University, Poland | |
Ankara University, Turkiye | |
Peking University, China | |
Konkoly Observatory, Hungary | |
Max Planck Society, Germany | |
National Autonomous University of Mexico, Mexico | |
Institute of Astrophysics of Andalusia, Spain | |
Mount Allison University, Canada | |
National Astronomical Research Institute of Thailand, Thailand | |
Masaryk University, Czech Republic | |
University of Arizona, United States | |
Bishop's University, Canada | |
Xi'an Jiaotong University, China | |
University of York, United Kingdom | |
Howard University, United States | |
ELTE Gothard Astrophysical Observatory, Hungary | |
University of Granada, Spain | |
Los Alamos National Laboratory, United States | |
University of Cape Town, South Africa | |
Diego Portales University, Chile | |
Royal Observatory of Belgium | |
Sorbonne University, France | |
University of Canterbury, New Zealand | |
Federico Santa Maria Technical University, Chile | |
Keele University, United Kingdom | |
Bulgarian Academy of Sciences, Bulgaria | |
Massachusetts Institute of Technology, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q738q/tess-cycle-1-observations-of-roap-stars-with-2-min-cadence-data
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