A wide star–black-hole binary system from radial-velocity measurements

@article{Liu2019AWS,
title={A wide star–black-hole binary system from radial-velocity measurements},
author={J. Liu and Hao-tong Zhang and A. Howard and Zhong-rui Bai and Y. Lu and R. Soria and S. Justham and X. Li and Z. Zheng and T. Wang and K. Belczynski and J. Casares and W. Zhang and Hailong Yuan and Yiqiao Dong and Y. Lei and H. Isaacson and S. Wang and Y. Bai and Y. Shao and Q. Gao and Yilun Wang and Ze-xi Niu and Kaiming Cui and C. Zheng and X. Mu and L. Zhang and W. Wang and A. Heger and Zhao-xiang Qi and S. Liao and M. Lattanzi and W. Gu and Junfeng Wang and Jianfeng Wu and Lixiong Shao and R. Shen and Xiaofeng Wang and J. Bregman and Rosanne Di Stefano and Q. Liu and Zhanwen Han and T. Zhang and H. Wang and J. Ren and J. Zhang and X. Wang and A. Cabrera-Lavers and R. Corradi and R. Rebolo and Y. Zhao and Gang Zhao and Y. Chu and X. Cui},
journal={Nature},
year={2019},
volume={575},
pages={618 - 621}
}

All stellar-mass black holes have hitherto been identified by X-rays emitted from gas that is accreting onto the black hole from a companion star. These systems are all binaries with a black-hole mass that is less than 30 times that of the Sun1–4. Theory predicts, however, that X-ray-emitting systems form a minority of the total population of star–black-hole binaries5,6. When the black hole is not accreting gas, it can be found through radial-velocity measurements of the motion of the companion… CONTINUE READING