X-ray-illuminated stellar winds - Optically thick wind models for massive X-ray binaries

Details X-ray-illuminated stellar winds - Optically thick wind models for massive X-ray binaries X-ray-illuminated stellar winds - Optically thick wind models for massive X-ray binaries

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379..310s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Sept. 20, 1991, p. 310-326.

Astronomy and Astrophysics

Astrophysics

19

Massive Stars, Neutron Stars, Optical Thickness, Stellar Winds, X Ray Binaries, Equations Of Motion, Gas Ionization, Radiative Transfer, Scaling Laws, Stellar Models

Scientific paper

The work of Stevens and Kallman (1990) on the effect of accretion-powered X-rays from the neutron star on the dynamics of the line-driven stellar wind of the early-type primary is extended. Radiative force multipliers that now depend on the column of attenuating material, as well as the ionization parameter, are calculated. Optical depth effects are found to suppress the effects of X-ray ionization on the force multipliers. A number of dynamical models for the winds of massive X-ray binary systems (MXRBs) are calculated with these force multipliers. Unlike the optically thin models, self-consistent dynamical solutions are found for reasonable values of the X-ray luminosity. These solutions also reveal the presence of nonlinear mechanisms that affect wind dynamics, whereby relatively small changes in the force multipliers can lead to significant changes in the wind structure. The models find the existence of a self-consistent region of solution at an X-ray luminosity of about 10 to the 36th ergs/s and suggest the possible existence of high-luminosity states.

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