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arxiv astro-ph/0604453 v1 pith:F3MXSG3Q submitted 2006-04-21 astro-ph

Solar-like oscillations in the metal-poor subgiant nu Indi: constraining the mass and age using asteroseismology

Timothy R. Bedding , R. Paul Butler , Fabien Carrier , Francois Bouchy , Brendon J. Brewer , Patrick Eggenberger , Frank Grundahl , Hans Kjeldsen
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Chris McCarthy Tine Bjorn Nielsen Alon Retter Christopher G. Tinney
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keywords asteroseismologymassmetal-pooroscillationsstarsubgiantableallowing
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Asteroseismology is a powerful method for determining fundamental properties of stars. We report the first application to a metal-poor object, namely the subgiant star nu Ind. We measured precise velocities from two sites, allowing us to detect oscillations and infer a large frequency separation of Delta_nu = 24.25 +/- 0.25 microHz. Combining this value with the location of the star in the H-R diagram and comparing with standard evolutionary models, we were able to place constraints on the stellar parameters. In particular, our results indicate that nu Ind has a low mass (0.85 +/- 0.04 M_sun) and is at least 9 Gyr old.

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  1. Asteroseismology of solar-type stars

    astro-ph.SR 2019-06 unverdicted novelty 2.0

    This review summarizes the development, techniques, and open questions in asteroseismology of solar-type stars whose oscillations are stochastically excited by surface convection.