The Oscillation Modes of \epsilon Cep and \tau Peg

Session 59 - Pulsating/Variable Stars.
Display session, Wednesday, June 12
Great Hall,

[59.01] The Oscillation Modes of \epsilon Cep and \tau Peg

S. D. Horner (Penn State), E. J. Kennelly, T. M. Brown (HAO), R. W. Noyes, S. G. Korzennik, P. Nisenson (CfA), S. Yang (U. of Victoria), A. Walker (UBC)

Asteroseismology of \delta Scuti stars offers an attractive prospect for determining the interior properties of main sequence and slightly more evolved A- and F-type stars. Here we present detailed identifications of oscillation modes in the rapidly rotating \delta Scuti stars \epsilon Cep and \tau Peg based on extensive observations carried out at two North American sites. Using cross-correlation and Fourier techniques we analyze the line-profile variations and the variations in the line-profile moments. A solution to the mode spectrum is sought using a genetic-based search algorithm and a line profile simulation model to reproduce the observed variations.

Program listing for Wednesday