2006/04/21 by Timothy R. Bedding, T. R. Bedding, R. Paul Butler +18 · 3 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/505295
published as Astrophys.J.647:558-563,2006 · accpted for publication in ApJ
arxiv created 2006/04/21 · openalex publication_date 2006/08/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
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 ν Ind. We measured precise velocities from two sites, allowing us to detect oscillations and infer a large frequency separation of Δν = 24.25 ± 0.25 μHz. 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 ν Ind has a low mass (0.85 ± 0.04 M ☉ ) and is at least 9 Gyr old.