Taking into account the effects of component proximity on the spectral-line profiles of stars in low-mass X-ray binary systems

被引：0
|
作者：
V. S. Petrov
E. A. Antokhina
A. M. Cherepashchuk
机构：
[1] Lomonosov Moscow State University,Sternberg Astronomical Institute
来源：
Astronomy Reports | 2015年 / 59卷
关键词：
Accretion Disk; Astronomy Report; Orbital Inclination; Stellar Surface; Roche Lobe;
D O I：
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中图分类号：
学科分类号：
摘要：
An exact calculation of CaI λ6439 Å absorption profiles in the spectra of optical stars in low-mass X-ray binary systems is carried out. The calculations are used to revise a formula relating the rotational broadening of lines and the component-mass ratio. In the case of modest (substantial) X-ray heating, failure to take into account the tidal-rotational deformation of the figure of the star leads to overestimation (underestimation) of the mass of the relativistic object. The radial-velocity curves of optical stars are modeled for binary systems with various parameters and X-ray heating powers kx; corresponding tables ofK corrections are presented. Refined values for the component-mass ratio q = 23 ± 1, black-hole mass Mx = 8.4 ± 0.5, and optical-star mass Mv = 0.36 ± 0.07 for the GS 2023+338 (V404 Cyg) system are presented.
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页码：346 / 359
页数：13
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