HYDRODYNAMICS OF WINDS FROM IRRADIATED COMPANION STARS IN LOW-MASS X-RAY BINARIES

被引：45
|
作者：
TAVANI, M
LONDON, R
机构：
[1] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544
[2] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550
来源：
ASTROPHYSICAL JOURNAL | 1993年 / 410卷 / 01期
关键词：
BINARIES; CLOSE; HYDRODYNAMICS; STARS; MASS LOSS; X-RAYS;
D O I：
10.1086/172744
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the hydrodynamics of evaporative winds driven by X-rays and/or soft gamma-rays irradiating the outer layers of companion stars in low-mass X-ray binaries (LMXBs). We consider several irradiating fluxes and spectra for LMXBs with white dwarf and main-sequence companion stars. The thermal structure of the base of the coronal region, the position of the sonic point, and the value of the mass-loss rate are calculated in the case of spherical geometry. We consider photospheric and coronal heating from both X-ray photoionization and Compton scattering of X-rays and soft gamma-rays with energy approximately 1 MeV possibly irradiating the companion star in LMXBs. Evaporative winds may play a relevant role for the evolution of a special class of radiation-driven LMXBs, and this study is a step toward a quantitative understanding of the mechanism driving LMXB evolution.
引用
收藏
页码：281 / 294
页数：14
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