Frequency ratio method for seismic modeling of gamma Doradus stars - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2005

Frequency ratio method for seismic modeling of gamma Doradus stars

Résumé

A method for obtaining asteroseismological information of a gamma Doradus oscillating star showing at least three pulsation frequencies is presented. This method is based on a first-order asymptotic g-mode expression, in agreement with the internal structure of gamma Doradus stars. The information obtained is twofold: 1) a possible identification of the radial order n and degree l of observed frequencies (assuming that these have the same l), and 2) an estimate of the integral of the buoyancy frequency (Brunt-Väisälä) weighted over the stellar radius along the radiative zone. The accuracy of the method as well as its theoretical consistency are also discussed for a typical gamma Doradus stellar model. Finally, the frequency ratios method has been tested with observed frequencies of the gamma Doradus star HD 12901. The number of representative models verifying the complete set of constraints (the location in the HR diagram, the Brunt-Väisälä frequency integral, the observed metallicity and frequencies and a reliable identification of n and l) is drastically reduced to six.

Dates et versions

hal-03729602 , version 1 (20-07-2022)

Identifiants

Citer

Andrés Moya, Juan Carlos Suárez, Pedro J. Amado, Susana Martin-Ruiz, Rafael Garrido. Frequency ratio method for seismic modeling of gamma Doradus stars. Astronomy and Astrophysics - A&A, 2005, 432, pp.189-198. ⟨10.1051/0004-6361:20041752⟩. ⟨hal-03729602⟩
3 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More