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2017MNRAS.471.3245Y - Mon. Not. R. Astron. Soc., 471, 3245-3260 (2017/November-1)

Instability, finite amplitude pulsation and mass-loss in models of massive OB-type stars.


Abstract (from CDS):

Variability and mass-loss are common phenomena in massive OB-type stars. It is argued that they are caused by violent strange mode instabilities identified in corresponding stellar models. We present a systematic linear stability analysis with respect to radial perturbations of massive OB-type stars with solar chemical composition and masses between 23 and 100 M. For selected unstable stellar models, we perform non-linear simulations of the evolution of the instabilities into the non-linear regime. Finite amplitude pulsations with periods in the range between hours and 100 dare found to be the final result of the instabilities. The pulsations are associated with a mean acoustic luminosity which can be the origin of a pulsationally driven wind. Corresponding mass-loss rates lie in the range between 10–9 and 10–4 M yr–1 and may thus affect the evolution of massive stars.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): instabilities - stars: massive - stars: mass-loss - stars: oscillations - supergiants - stars: winds, outflows - stars: winds, outflows

Simbad objects: 5

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