The large-scale magnetic fields of planet-hosting solar-type stars

PhD Thesis

Mengel, Matthew W.. 2017. The large-scale magnetic fields of planet-hosting solar-type stars. PhD Thesis Doctor of Philosophy. University of Southern Queensland. https://doi.org/10.26192/1nc9-fe53
Title

The large-scale magnetic fields of planet-hosting solar-type stars

TypePhD Thesis
Authors
AuthorMengel, Matthew W.
SupervisorMarsden, Stephen C.
Carter, Bradley D.
Fares, Rim
Institution of OriginUniversity of Southern Queensland
Qualification NameDoctor of Philosophy
Number of Pages165
Year2017
Digital Object Identifier (DOI)https://doi.org/10.26192/1nc9-fe53
Abstract

Stellar magnetic fields and their associated phenomena influence stellar behaviour and evolution, and potentially have significant impacts on any surrounding planetary system. However, the nature of star-planet interactions is unclear, especially the potential impact on a star of a closely orbiting massive planet with a powerful magnetic field.

This thesis presents a spectropolarimetric survey of the large-scale magnetic fields of planet-hosting solar-type stars. While little evidence is found for a systematic difference in the magnetic field characteristics of planet-hosting stars compared with the population of solar-type stars, a small positive correlation is indicated between the magnitude of the tidal effects of the planet on the star and the magnetic field strength. Nevertheless, further spectropolarimetric observations of hot Jupiter hosting systems are required to confirm this tentative relationship.

For the particular case of a moderately active star with a thin convective zone and a closely orbiting hot Jupiter (T Boötis) presented here, a remarkably rapid magnetic cycle with a period of - 240 d is discovered. For stars with shallow convective envelopes, this is an unusual occurrence and suggests a possible role for planetary tidal or magnetic interaction with the star’s convective zone and magnetic dynamo. More observations are required to verify this possible star-planet interaction and to extend the work to other similar systems as they come to light from exoplanet surveys.

Keywordsstellar magnetic fields, stars, magnetic fields, planetary systems
ANZSRC Field of Research 2020510109. Stellar astronomy and planetary systems
Byline AffiliationsComputational Engineering and Science Research Centre
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Nicholson, B. A., Hussain, G. A. J., Donati, J.-F., Folsom, C. P., Mengel, M., Carter, B. D. and Wright, D.. 2018. "The surface magnetic activity of the weak-line T Tauri stars TWA 9Aand V1095 Sco." Monthly Notices of the Royal Astronomical Society. 480 (2), pp. 1754-1766. https://doi.org/10.1093/mnras/sty1965
TESS Hunt for Young and Maturing Exoplanets (THYME): A Planet in the 45 Myr Tucana-Horologium Association
Newton, Elisabeth R., Mann, Andrew W., Tofflemire, Benjamin M., Pearce, Logan, Rizzuto, Aaron C., Vanderburg, Andrew, Martinez, Raquel A., Wang, Jason J., Ruffio, Jean-Baptiste, Kraus, Adam L., Johnson, Marshall C., Thao, Pa Chia, Wood, Mackenna L., Rampalli, Rayna, Nielsen, Eric L., Collins, Karen A., Dragomir, Diana, Hellier, Coel, Anderson, D. R, ..., Wittenmyer, Robert A.. 2019. "TESS Hunt for Young and Maturing Exoplanets (THYME): A Planet in the 45 Myr Tucana-Horologium Association." The Astrophysical Journal Letters. 880 (1), pp. 1-15. https://doi.org/10.3847/2041-8213/ab2988
A young solar twin in the Rosette cluster NGC 2244 line of sight
Huber, Jeremy M., Kielkopf, John F., Mengel, Matthew, Carter, Bradley D., Ferland, Gary J. and Clark, Frank O.. 2018. "A young solar twin in the Rosette cluster NGC 2244 line of sight." Monthly Notices of the Royal Astronomical Society. 476 (1), pp. 323-335. https://doi.org/10.1093/mnras/sty188
A BCool survey of the magnetic fields of planet-hosting solar-type stars
Mengel, M. W., Marsden, S. C., Carter, B. D., Horner, J., King, R., Fares, R., Jeffers, S. V., Petit, P., Vidotto, A. A. and Morin, J.. 2017. "A BCool survey of the magnetic fields of planet-hosting solar-type stars." Monthly Notices of the Royal Astronomical Society. 465 (3), pp. 2734-2747. https://doi.org/10.1093/mnras/stw2949
The Anglo-Australian planet search. XXV. A candidate massive Saturn analog orbiting HD 30177
Wittenmyer, Robert A., Horner, Jonathan, Mengel, M. W., Butler, R. P., Wright, D. J., Tinney, C. G., Carter, B. D., Jones, H. R. A., Anglada-Escude, G., Bailey, J. and O'Toole, Simon J.. 2017. "The Anglo-Australian planet search. XXV. A candidate massive Saturn analog orbiting HD 30177." The Astronomical Journal. 153 (4), pp. 1-12. https://doi.org/10.3847/1538-3881/aa5f17
Temporal variability of the wind from the star τ Boötis
Nicholson, B. A., Vidotto, A. A., Mengel, M., Brookshaw, L., Carter, B., Petit, P., Marsden, S. C., Jeffers, S. V. and Fares, R.. 2016. "Temporal variability of the wind from the star τ Boötis." Monthly Notices of the Royal Astronomical Society. 459 (2), pp. 1907-1915. https://doi.org/10.1093/mnras/stw731
The Pan-Pacific planet search. IV. Two super-Jupiters in a 3:5 resonance orbiting the giant star HD 33844
Wittenmyer, Robert A., Johnson, John Asher, Butler, R. P., Horner, Jonathan, Wang, Liang, Robertson, Paul, Jones, M. I., Jenkins, J. S., Brahm, R., Tinney, C. G., Mengel, M. W. and Clark, J.. 2016. "The Pan-Pacific planet search. IV. Two super-Jupiters in a 3:5 resonance orbiting the giant star HD 33844." The Astrophysical Journal: an international review of astronomy and astronomical physics. 818 (1), pp. 35-42. https://doi.org/10.3847/0004-637X/818/1/35
Winds of planet hosting stars
Nicholson, B. A., Mengel, M. W., Brookshaw, L., Vidotto, A. A., Carter, B. D., Marsden, S. C., Soutter, J., Waite, I. A. and Horner, J.. 2015. "Winds of planet hosting stars." Short, Wayne and Cairns, Iver (ed.) 14th Australian Space Research Conference (ASRC 2014). Adelaide, Australia 29 Sep - 01 Oct 2014 Sydney, Australia.
The evolving magnetic topology of τ Boötis
Mengel, M. W., Fares, R., Marsden, S. C., Carter, B. D., Jeffers, S. V., Petit, P., Donati, J.-F. and Folsom, C. P.. 2016. "The evolving magnetic topology of τ Boötis." Monthly Notices of the Royal Astronomical Society. 459 (4), pp. 4325-4342. https://doi.org/10.1093/mnras/stw828
Do young Suns undergo magnetic reversals?
Marsden, Stephen C., Jeffers, Sandra V., Donati, Jean-Francois, Mengel, Matthew W., Waite, Ian A. and Carter, Brad D.. 2010. "Do young Suns undergo magnetic reversals?" Kosovichev, Alexander, Rozelot, Jean-Pierre and Andrei, Alexandre (ed.) International Astronomical Union Symposium (IAUS 264): Solar and Stellar Variability: Impact on Earth and Planets. Rio de Janeiro, Brazil 03 - 07 Aug 2009 Cambridge, United Kingdom. https://doi.org/10.1017/S1743921309992535
A multiwavelength study of CC Eridani
Slee, O. B., Budding, E., Carter, Brad D., Mengel, Matthew Wayne, Waite, Ian A. and Donati, J.-F.. 2004. "A multiwavelength study of CC Eridani." Publications of the Astronomical Society of Australia. 21 (1), pp. 72-81. https://doi.org/10.1071/AS03034
Dynamo processes and activity cycles of the active stars AB Doradus, LQ Hydrae and HR 1099
Donati, J.-F., Collier Cameron, A., Semel, M., Hussain, G. A. J., Petit, P., Carter, B. D., Marsden, S. C., Mengel, M., Lopez Ariste, A., Jeffers, S. V. and Rees, D. E.. 2003. "Dynamo processes and activity cycles of the active stars AB Doradus, LQ Hydrae and HR 1099." Monthly Notices of the Royal Astronomical Society. 345 (4), pp. 1145-1186. https://doi.org/10.1046/j.1365-2966.2003.07031.x
The magnetic activity of young suns: magnetic topologies and differential rotation of F- and G- dwarfs
Marsden, S. C., Mengel, M. W., Donati, J.-F., Carter, B. D., Semel, M. and Petit, P.. 2006. "The magnetic activity of young suns: magnetic topologies and differential rotation of F- and G- dwarfs." Casini, R. and Lites, B. W. (ed.) 4th Solar Polarization Workshop. Boulder, United States 19 - 23 Sep 2005 San Francisco, United States.
High-resolution spectroscopy of some active southern stars
Waite, I. A., Carter, B. D., Marsden, S. C. and Mengel, M. W.. 2005. "High-resolution spectroscopy of some active southern stars." Publications of the Astronomical Society of Australia. 22 (1), pp. 29-35. https://doi.org/10.1071/AS04058
The active young solar-type star HR 1817 (=HD 35850)
Mengel, Matthew Wayne. 2005. The active young solar-type star HR 1817 (=HD 35850). Masters Thesis Master of Philosophy. University of Southern Queensland.
A radio and optical study of the active young F star HR 1817 (=HD 35850)
Budding, E., Carter, B. D., Mengel, M. W., Slee, O. B. and Donati, J. -F.. 2002. "A radio and optical study of the active young F star HR 1817 (=HD 35850)." Publications of the Astronomical Society of Australia. 19 (4), pp. 527-533. https://doi.org/10.1071/AS02021
Surface differential rotation and prominences of the Lupus post T Tauri star RX J1508.6-4423
Donati, J.-F., Mengel, M., Carter, B. D., Marsden, S., Collier Cameron, A. and Wichmann, R.. 2000. "Surface differential rotation and prominences of the Lupus post T Tauri star RX J1508.6-4423." Monthly Notices of the Royal Astronomical Society. 316 (3), pp. 699-715. https://doi.org/10.1046/j.1365-8711.2000.03570.x