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Issue A&A
Volume 453, Number 3, July III 2006
Page(s) L35 - L37
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200600027



A&A 453, L35-L37 (2006)
DOI: 10.1051/0004-6361:200600027

Letter

A MOST probable explanation of the pulsation of WR 123

E. A. Dorfi1, A. Gautschy2 and H. Saio3

1  Institut für Astronomie der Universität Wien, Türkenschanzstr. 17, 1180 Wien, Austria
    e-mail: dorfi@astro.univie.ac.at
2  Wetterchrüzstr. 8c, 4410 Liestal, Switzerland
3  Astronomical Institute, Tohoku University, Sendai, Japan

(Received 28 November 2005 / Accepted 18 May 2006 )

Abstract
Aims.Resorting to the observed period of the cyclic part of WR 123's photometric variability we constrain its stellar parameters.
Methods.Radiation hydrodynamic simulations were performed on selected stellar envelope models for which also linear stability analyses were computed.
Results.Pulsations of massive hydrogen-rich stellar envelopes subject to sufficiently high luminosity-to-mass ratios are excited with periods that conform with the observed one by MOST in WR123.


Key words: stars: massive -- stars: pulsations -- stars: individual: WR123



© ESO 2006


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