2008/07/11 by H. Kjeldsen, Hans Kjeldsen, Timothy R. Bedding +3 · 5 citations
Physics and Astronomy · #Asteroseismology #Astrophysics #Astrophysics and Star Formation Studies #Computational physics #Computer science #Helioseismology #Offset (computer science) #Oscillation (cell signaling) #Physics #Solar and Space Plasma Dynamics #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/591667
accepted for publication in ApJ Letters
arxiv created 2008/07/11 · openalex publication_date 2008/07/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In helioseismology, there is a well-known offset between observed and computed oscillation frequencies. This offset is known to arise from improper modeling of the near-surface layers of the Sun, and a similar effect must occur for models of other stars. Such an effect impedes progress in asteroseismology, which involves comparing observed oscillation frequencies with those calculated from theoretical models. Here, we use data for the Sun to derive an empirical correction for the near-surface offset, which we then apply to three other stars (α Cen A, α Cen B, and β Hyi). The method appears to give good results, in particular providing an accurate estimate of the mean density of each star.