Weighing in on the masses of retired A stars with asteroseismology: K2 observations of the exoplanet-host star HD 212771

Campante, T. L.; Veras, D.; North, T. S. H.; Miglio, A.; Morel, Thierry; Johnson, J. A.; Chaplin, W. J.; Davies, G. R.; Huber, D.; Kuszlewicz, J. S.; Lund, M. N.; Cooke, B. F.; Elsworth, Y. P.; Rodrigues, T. S.; Vanderburg, A.

doi:10.1093/mnras/stx876

Article (Scientific journals)

Weighing in on the masses of retired A stars with asteroseismology: K2 observations of the exoplanet-host star HD 212771

Campante, T. L.; Veras, D.; North, T. S. H. et al.

2017 • In Monthly Notices of the Royal Astronomical Society: Letters, 469 (2), p. 1360-1368

Peer reviewed

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https://hdl.handle.net/2268/228612

DOI
10.1093/mnras/stx876

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Keywords :

Asteroseismology; Planet-star interactions; Planetary systems; Stars: individual: HD 212771; Techniques: photometric; Techniques: spectroscopic

Abstract :

[en] Doppler-based planet surveys point to an increasing occurrence rate of giant planets with stellar mass. Such surveys rely on evolved stars for a sample of intermediate-mass stars (so-called retired A stars), which are more amenable to Doppler observations than their main-sequence progenitors. However, it has been hypothesized that themasses of subgiant and low-luminosity red-giant stars targeted by these surveys - typically derived from a combination of spectroscopy and isochrone fitting - may be systematically overestimated. Here, we test this hypothesis for the particular case of the exoplanet-host star HD 212771 using K2 asteroseismology. The benchmark asteroseismic mass (1.45±0.10 -0.09M·) is significantly higher than the value reported in the discovery paper (1.15± 0.08M·), which has been used to inform the stellar mass- planet occurrence relation. This result, therefore, does not lend support to the above hypothesis. Implications for the fates of planetary systems are sensitively dependent on stellarmass. Based on the derived asteroseismic mass, we predict the post-main-sequence evolution of the Jovian planet orbiting HD 212771 under the effects of tidal forces and stellar mass-loss. © 2017 The Authors.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Campante, T. L.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark, Institut für Astrophysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, Göttingen, Germany

Veras, D.; Department of Physics, University of Warwick, Coventry, United Kingdom

North, T. S. H.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark

Miglio, A.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark

Morel, Thierry ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie

Johnson, J. A.; Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, United States

Chaplin, W. J.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark

Davies, G. R.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark

Huber, D.; Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark, Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, NSW, Australia, Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI, United States, SETI Institute, 189 Bernardo Avenue, Mountain View, CA, United States

Kuszlewicz, J. S.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, United Kingdom, Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Denmark

More authors (5 more)

Language :

English

Title :

Weighing in on the masses of retired A stars with asteroseismology: K2 observations of the exoplanet-host star HD 212771

Publication date :

2017

Journal title :

Monthly Notices of the Royal Astronomical Society: Letters

ISSN :

1745-3925

eISSN :

1745-3933

Publisher :

Oxford University Press

Volume :

469

Issue :

Pages :

1360-1368

Peer reviewed :

Peer reviewed

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