International Centre for Radio Astronomy Research-Curtin University, Perth, WA 6845, Australia.
Astronomy Department, San Diego State University, San Diego, CA 92182-1221, USA.
Science. 2021 Mar 5;371(6533):1046-1049. doi: 10.1126/science.abb3363. Epub 2021 Feb 18.
The evolution of massive stars is influenced by the mass lost to stellar winds over their lifetimes. These winds limit the masses of the stellar remnants (such as black holes) that the stars ultimately produce. We used radio astrometry to refine the distance to the black hole x-ray binary Cygnus X-1, which we found to be [Formula: see text] kiloparsecs. When combined with archival optical data, this implies a black hole mass of 21.2 ± 2.2 solar masses, which is higher than previous measurements. The formation of such a high-mass black hole in a high-metallicity system (within the Milky Way) constrains wind mass loss from massive stars.
大质量恒星的演化受到其一生中恒星风损失质量的影响。这些风限制了恒星最终产生的恒星残骸（如黑洞）的质量。我们使用射电天体测量法来精确测量黑洞 X 射线双星天鹅座 X-1 的距离，发现它距离为[公式：见文本]千秒差距。当与档案中的光学数据结合使用时，这意味着黑洞的质量为 21.2 ± 2.2 个太阳质量，高于之前的测量值。在高金属丰度系统（在银河系内）中形成如此高质量的黑洞，限制了大质量恒星的风质量损失。
