Seismic constraints on rotation of Sun-like star and mass of exoplanet

Laurent Gizon; Jérome Ballot; Eric Michel; Thorsten Stahn; Gérard Vauclair; Hans Bruntt; Pierre Olivier Quirion; Othman Benomar; Sylvie Vauclair; Thierry Appourchaux; Michel Auvergne; Annie Baglin; Caroline Barban; Fréderic Baudin; Michaël Bazot; Tiago Campante; Claude Catala; William Chaplin; Orlagh Creevey; Sébastien Deheuvels; Noël Dolez; Yvonne Elsworth; Rafael García; Patrick Gaulme; Stéphane Mathis; Savita Mathur; Benoît Mosser; Clara Régulo; Ian Roxburgh; David Salabert; Réza Samadi; Kumiko Sato; Graham Verner; Shravan Hanasoge; Katepalli R. Sreenivasan

doi:10.1073/pnas.1303291110

Seismic constraints on rotation of Sun-like star and mass of exoplanet

Laurent Gizon, Jérome Ballot, Eric Michel, Thorsten Stahn, Gérard Vauclair, Hans Bruntt, Pierre Olivier Quirion, Othman Benomar, Sylvie Vauclair, Thierry Appourchaux, Michel Auvergne, Annie Baglin, Caroline Barban, Fréderic Baudin, Michaël Bazot, Tiago Campante, Claude Catala, William Chaplin, Orlagh Creevey, Sébastien DeheuvelsNoël Dolez, Yvonne Elsworth, Rafael García, Patrick Gaulme, Stéphane Mathis, Savita Mathur, Benoît Mosser, Clara Régulo, Ian Roxburgh, David Salabert, Réza Samadi, Kumiko Sato, Graham Verner, Shravan Hanasoge, Katepalli R. Sreenivasan^*

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

Rotation is thought to drive cyclic magnetic activity in the Sun and Sun-like stars. Stellar dynamos, however, are poorly understood owing to the scarcity of observations of rotation and magnetic fields in stars. Here, inferences are drawn on the internal rotation of a distant Sun-like star by studying its global modes of oscillation. We report asteroseismic constraints imposed on the rotation rate and the inclination of the spin axis of the Sun-like star HD 52265, a principal target observed by the CoRoT satellite that is known to host a planetary companion. These seismic inferences are remarkably consistent with an independent spectroscopic observation (rotational line broadening) and with the observed rotation period of star spots. Furthermore, asteroseismology constrains the mass of exoplanet HD 52265b. Under the standard assumption that the stellar spin axis and the axis of the planetary orbit coincide, the minimum spectroscopic mass of the planet can be converted into a true mass of 1:85+0:52 -0:42MJupiter, which implies that it is a planet, not a brown dwarf.

Original language	English
Pages (from-to)	13267-13271
Number of pages	5
Journal	National Academy of Sciences. Proceedings
Volume	110
Issue number	33
DOIs	https://doi.org/10.1073/pnas.1303291110
Publication status	Published - 13 Aug 2013

Keywords

Extrasolar planets
Stellar oscillations
Stellar rotation

ASJC Scopus subject areas

General

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10.1073/pnas.1303291110

Cite this

Gizon, L., Ballot, J., Michel, E., Stahn, T., Vauclair, G., Bruntt, H., Quirion, P. O., Benomar, O., Vauclair, S., Appourchaux, T., Auvergne, M., Baglin, A., Barban, C., Baudin, F., Bazot, M., Campante, T., Catala, C., Chaplin, W., Creevey, O., ... Sreenivasan, K. R. (2013). Seismic constraints on rotation of Sun-like star and mass of exoplanet. National Academy of Sciences. Proceedings, 110(33), 13267-13271. https://doi.org/10.1073/pnas.1303291110

@article{293571ba2a7e43f9affce451d9892b63,

title = "Seismic constraints on rotation of Sun-like star and mass of exoplanet",

abstract = "Rotation is thought to drive cyclic magnetic activity in the Sun and Sun-like stars. Stellar dynamos, however, are poorly understood owing to the scarcity of observations of rotation and magnetic fields in stars. Here, inferences are drawn on the internal rotation of a distant Sun-like star by studying its global modes of oscillation. We report asteroseismic constraints imposed on the rotation rate and the inclination of the spin axis of the Sun-like star HD 52265, a principal target observed by the CoRoT satellite that is known to host a planetary companion. These seismic inferences are remarkably consistent with an independent spectroscopic observation (rotational line broadening) and with the observed rotation period of star spots. Furthermore, asteroseismology constrains the mass of exoplanet HD 52265b. Under the standard assumption that the stellar spin axis and the axis of the planetary orbit coincide, the minimum spectroscopic mass of the planet can be converted into a true mass of 1:85+0:52 -0:42MJupiter, which implies that it is a planet, not a brown dwarf.",

keywords = "Extrasolar planets, Stellar oscillations, Stellar rotation",

author = "Laurent Gizon and J{\'e}rome Ballot and Eric Michel and Thorsten Stahn and G{\'e}rard Vauclair and Hans Bruntt and Quirion, {Pierre Olivier} and Othman Benomar and Sylvie Vauclair and Thierry Appourchaux and Michel Auvergne and Annie Baglin and Caroline Barban and Fr{\'e}deric Baudin and Micha{\"e}l Bazot and Tiago Campante and Claude Catala and William Chaplin and Orlagh Creevey and S{\'e}bastien Deheuvels and No{\"e}l Dolez and Yvonne Elsworth and Rafael Garc{\'i}a and Patrick Gaulme and St{\'e}phane Mathis and Savita Mathur and Beno{\^i}t Mosser and Clara R{\'e}gulo and Ian Roxburgh and David Salabert and R{\'e}za Samadi and Kumiko Sato and Graham Verner and Shravan Hanasoge and Sreenivasan, {Katepalli R.}",

year = "2013",

month = aug,

day = "13",

doi = "10.1073/pnas.1303291110",

language = "English",

volume = "110",

pages = "13267--13271",

journal = "National Academy of Sciences. Proceedings",

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Gizon, L, Ballot, J, Michel, E, Stahn, T, Vauclair, G, Bruntt, H, Quirion, PO, Benomar, O, Vauclair, S, Appourchaux, T, Auvergne, M, Baglin, A, Barban, C, Baudin, F, Bazot, M, Campante, T, Catala, C, Chaplin, W, Creevey, O, Deheuvels, S, Dolez, N, Elsworth, Y, García, R, Gaulme, P, Mathis, S, Mathur, S, Mosser, B, Régulo, C, Roxburgh, I, Salabert, D, Samadi, R, Sato, K, Verner, G, Hanasoge, S & Sreenivasan, KR 2013, 'Seismic constraints on rotation of Sun-like star and mass of exoplanet', National Academy of Sciences. Proceedings, vol. 110, no. 33, pp. 13267-13271. https://doi.org/10.1073/pnas.1303291110

TY - JOUR

T1 - Seismic constraints on rotation of Sun-like star and mass of exoplanet

AU - Gizon, Laurent

AU - Ballot, Jérome

AU - Michel, Eric

AU - Stahn, Thorsten

AU - Vauclair, Gérard

AU - Bruntt, Hans

AU - Quirion, Pierre Olivier

AU - Benomar, Othman

AU - Vauclair, Sylvie

AU - Appourchaux, Thierry

AU - Auvergne, Michel

AU - Baglin, Annie

AU - Barban, Caroline

AU - Baudin, Fréderic

AU - Bazot, Michaël

AU - Campante, Tiago

AU - Catala, Claude

AU - Chaplin, William

AU - Creevey, Orlagh

AU - Deheuvels, Sébastien

AU - Dolez, Noël

AU - Elsworth, Yvonne

AU - García, Rafael

AU - Gaulme, Patrick

AU - Mathis, Stéphane

AU - Mathur, Savita

AU - Mosser, Benoît

AU - Régulo, Clara

AU - Roxburgh, Ian

AU - Salabert, David

AU - Samadi, Réza

AU - Sato, Kumiko

AU - Verner, Graham

AU - Hanasoge, Shravan

AU - Sreenivasan, Katepalli R.

PY - 2013/8/13

Y1 - 2013/8/13

N2 - Rotation is thought to drive cyclic magnetic activity in the Sun and Sun-like stars. Stellar dynamos, however, are poorly understood owing to the scarcity of observations of rotation and magnetic fields in stars. Here, inferences are drawn on the internal rotation of a distant Sun-like star by studying its global modes of oscillation. We report asteroseismic constraints imposed on the rotation rate and the inclination of the spin axis of the Sun-like star HD 52265, a principal target observed by the CoRoT satellite that is known to host a planetary companion. These seismic inferences are remarkably consistent with an independent spectroscopic observation (rotational line broadening) and with the observed rotation period of star spots. Furthermore, asteroseismology constrains the mass of exoplanet HD 52265b. Under the standard assumption that the stellar spin axis and the axis of the planetary orbit coincide, the minimum spectroscopic mass of the planet can be converted into a true mass of 1:85+0:52 -0:42MJupiter, which implies that it is a planet, not a brown dwarf.

AB - Rotation is thought to drive cyclic magnetic activity in the Sun and Sun-like stars. Stellar dynamos, however, are poorly understood owing to the scarcity of observations of rotation and magnetic fields in stars. Here, inferences are drawn on the internal rotation of a distant Sun-like star by studying its global modes of oscillation. We report asteroseismic constraints imposed on the rotation rate and the inclination of the spin axis of the Sun-like star HD 52265, a principal target observed by the CoRoT satellite that is known to host a planetary companion. These seismic inferences are remarkably consistent with an independent spectroscopic observation (rotational line broadening) and with the observed rotation period of star spots. Furthermore, asteroseismology constrains the mass of exoplanet HD 52265b. Under the standard assumption that the stellar spin axis and the axis of the planetary orbit coincide, the minimum spectroscopic mass of the planet can be converted into a true mass of 1:85+0:52 -0:42MJupiter, which implies that it is a planet, not a brown dwarf.

KW - Extrasolar planets

KW - Stellar oscillations

KW - Stellar rotation

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U2 - 10.1073/pnas.1303291110

DO - 10.1073/pnas.1303291110

M3 - Article

C2 - 23898183

AN - SCOPUS:84882394180

SN - 0027-8424

VL - 110

SP - 13267

EP - 13271

JO - National Academy of Sciences. Proceedings

JF - National Academy of Sciences. Proceedings

IS - 33

ER -

Seismic constraints on rotation of Sun-like star and mass of exoplanet

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Keywords

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