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Wroclaw HELAS Workshop ’Interpretation of Asteroseismic Data’, Date: 2008/10/01 - 2008/10/01, Location: Wroclaw, Poland

Publication date: 2008-12-01
Volume: 157 Pages: 332 - 333

Communications in Asteroseismology

Author:

Lehmann, H
Tkachenko, A ; Tsymbal, V ; Mkrtichian, DE ; Breger, Michel ; Dziembowski, Wojciech ; Thompson, Michael

Keywords:

0201 Astronomical and Space Sciences

Abstract:

We investigate a spectroscopic time series of the oscillating Algol-type star TW Dra to derive basic system and stellar parameters and to prepare for mode identification. From the orbital solution we derive precise masses and get disentangled spectra of the components by using KOREL. For the primary we derive about solar abundance. Computed LSD profiles show a puzzling picture of blue-to-red traveling bumps indicating a rich spectrum of nonradial pulsations. Three pulsation frequencies could be found by using FAMIAS. A first attempt of mode identification indicates that TW Dra shows high-degree modes in the range of l=7-12.