On the stability and pulsations of Wolf-Rayet stars

Details On the stability and pulsations of Wolf-Rayet stars On the stability and pulsations of Wolf-Rayet stars

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262l...7g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 1, p. L7-L11.

Astronomy and Astrophysics

Astronomy

66

Main Sequence Stars, Stellar Models, Stellar Oscillations, Wolf-Rayet Stars, Dynamic Stability, Stellar Mass, Vibration Mode

Scientific paper

Motivated by the discovery of fast pulsations in a Wolf-Rayet star, models of helium main-sequence stars are tested for stability with respect to radial perturbations. Dynamical strange-mode instabilities are identified, in addition to the instability of the fundamental mode driven by the classical epsilon-mechanism and discussed in recent publications. With respect to both range and strength, instabilities caused by the epsilon-mechanism are negligible when compared with strange-mode instabilities. The implication of these results for the interpretation of the observed variability in Wolf-Rayet stars is discussed, in particular with respect to mode identification and mass determinations.

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