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Solar-like oscillations in the metal-poor subgiant nu Indi: Constraining the mass and age using asteroseismology (2006) |
- Butler, R. Paul,
- Bouchy, Francois,
- Brewer, Brendon J,
- Eggenberger, Patrick,
- Grundahl, Frank,
- Kjeldsen, Hans,
- McCarthy, Chris,
- Nielsen, Tine Bjorn,
- Retter, Alon,
- Tinney, Christopher G
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Abstract |
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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 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. |
Publication details |
| Download |
http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=CCC&SrcApp=PRODUCT_NAME&SrcURL=WOS_RETURN_URL&CKEY=BEDD0558060647AT&DestLinkType=FullRecord&DestApp=CCC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SID |
| Publisher |
Univ chicago press
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| Repository |
Lirias is a research document repository at KULeuven (Belgium) |
| Keywords |
stars : individual (nu indi),
stars : oscillations,
sun : helioseismology,
alpha-centauri-a,
velocity-measurements,
acoustic spectrum,
eta-bootis,
star,
diameter,
procyon,
models
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| Type |
IT,
article
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| Language |
English
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| Relation |
Astrophysical journal vol:647 issue:1 pages:558-563
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