Asteroseismology of F-type stars has been hindered by an ambiguity in identification of their oscillation modes. The regular mode pattern that makes this task trivial in cooler stars is masked by increased linewidths. The absolute mode frequencies, encapsulated in the asteroseismic variable epsilon, can help solve this impasse because the values of epsilon implied by the two possible mode identifications are distinct. We find that the correct epsilon can be deduced from the effective temperature and the linewidths and we apply these methods to a sample of solar-like oscillators observed with Kepler.
@article{arxiv.1205.0544,
title = {Solving the mode identification problem in asteroseismology of F stars observed with Kepler},
author = {Timothy R. White and Timothy R. Bedding and Michael Gruberbauer and Othman Benomar and Dennis Stello and Thierry Appourchaux and William J. Chaplin and Jørgen Christensen-Dalsgaard and Yvonne P. Elsworth and Rafael A. García and Saskia Hekker and Daniel Huber and Hans Kjeldsen and Benoît Mosser and Karen Kinemuchi and Fergal Mullally and Martin Still},
journal= {arXiv preprint arXiv:1205.0544},
year = {2015}
}
Comments
7 pages, 4 figures, 1 table, accepted for publication in The Astrophysical Journal Letters