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

被引：41

作者：

Bedding, Timothy R. ^{[1
]}

Butler, R. Paul

Carrier, Fabien

Bouchy, Francois

Brewer, Brendon J.

Eggenberger, Patrick

Grundahl, Frank

Kjeldsen, Hans

McCarthy, Chris

Nielsen, Tine Bjorn

Retter, Alon

Tinney, Christopher G.

机构：

[1] Univ Sydney, Sch Phys A28, Sydney, NSW 2006, Australia

[2] Carnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015 USA

[3] Observ Geneva, CH-1290 Sauverny, Switzerland

[4] Astrophys Lab, F-13376 Marseille 12, France

[5] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[6] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA

[7] Anglo Australian Observ, Epping, NSW 1710, Australia

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 647卷 / 01期

基金：

美国国家科学基金会;

关键词：

stars : individual (nu Indi); stars : oscillations; Sun : helioseismology;

D O I：

10.1086/505295

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 mu Hz. 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-circle dot) and is at least 9 Gyr old.

引用

页码：558 / 563

页数：6

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