Title: The oEA star TW Dra - a spectroscopic analysis
Authors: Lehmann, H.
Tkachenko, A.
Tsymbal, V.
Mkrtichian, D.E.
Issue Date: Dec-2008
Host Document: Communications in Asteroseismology vol:157 pages:332-333
Conference: Wroclaw HELAS Workshop ’Interpretation of Asteroseismic Data’ location:Wroclaw, Poland date:October 2008
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.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Institute of Astronomy

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