Non-linear pulsations in Wolf-Rayet stars

Details Non-linear pulsations in Wolf-Rayet stars Non-linear pulsations in Wolf-Rayet stars

2009-08-07

arxiv.org/abs/0908.1029v1

2008ASPC..391..319W

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 2 figures, HYDEF 2007 Proceeding

Scientific paper

Numerical simulations of the evolution of strange-mode instabilities into the non-linear regime have been performed for a wide range of stellar parameters for Wolf-Rayet stars. It has been shown that the Wolf-Rayet models reach radial velocities which amount to up to 30% of their escape velocity. The acoustic luminosities suggest a connection to the observed mass loss. Most of the models show a jump in the mean effective temperature after reaching the non-linear regime. This jump is related to the run of the opacity.

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