The mass of the black hole in the X-ray binary LMC X-1

M. K. Abubekerov; E. A. Antokhina; N. Yu. Gostev; A. M. Cherepashchuk; V. V. Shimansky

doi:10.1134/S1063772916120015

The mass of the black hole in the X-ray binary LMC X-1

Authors: Abubekerov M.K.¹, Antokhina E.A.¹, Gostev N.Y.¹, Cherepashchuk A.M.¹, Shimansky V.V.²
Affiliations:
1. Sternberg Astronomical Institute
2. Kazan Federal University
Issue: Vol 60, No 12 (2016)
Pages: 1029-1034
Section: Article
URL: https://bakhtiniada.ru/1063-7729/article/view/190207
DOI: https://doi.org/10.1134/S1063772916120015
ID: 190207

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Abstract

A dynamical estimate of the mass of the black hole in the LMC X-1 binary system is obtained in the framework of a Roche model for the optical star, based on fitting of the He I 4471 Å and He II 4200 Å absorption lines assuming LTE. The mass of the black hole derived from the radial-velocity curve for the He II 4200 Å line is m_x = 10.55 M_⊙, close to the value found earlier based on a model with two point bodies [1].