解读天鹅座X-1最新参数测量结果  

Interpret the latest parameter measurement results of Cygnus X-1

作　　者：赵雪杉 冯叶 苟利军 ZHAO Xueshan;FENG Ye;GOU Lijun(National Astronomical Observatories,Chinese Academy of Sciences(NAOC),Beijing 100101,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家天文台,北京100101 [2]中国科学院大学天文和空间科学学院,北京100049

出　　处：《自然杂志》2021年第3期209-216,共8页Chinese Journal of Nature

基　　金：国家重点研发计划(2016YFA0400804);国家自然科学基金(U1838114)

摘　　要：1964年发现的天鹅座X-1是人类历史上第一颗可观测到的恒星级黑洞,它持续不断地吸引着天文学家的目光。精确测量该系统的参数有利于天文学家加深理解天鹅座X-1的物理性质,并有助于对恒星演化作出更好的限制。2011年,首次全面测量天鹅座X-1系统的质量、距离、自旋等参数;2021年,包括国家天文台在内的国际合作团队再次对该系统进行精确测量,全面更新了系统参数。文章详细介绍天鹅座X-1的质量、距离、自旋三个参数的测量方法,以及2011和2021年两次精确测量的结果,并讨论了最新的测量结果对恒星及双星演化的启示。Cygnus X-1 discovered in 1964 was the first stellar mass black hole that has ever been observed,which continues to fascinate astronomers.Accurate measurements of the systematical parameters will help astronomers better understand its physical properties and put better limits on the evolution of stars.In 2011,the mass,distance,spin and other parameters of this system were comprehensive measured for the first time.In 2021,an international team including researchers from NAOC again made precise measurements and updated all the systematical parameters of Cygnus X-1.In this paper,we introduce the methods for measuring the mass,distance and spin of Cygnus X-1,present results of two previous precise measurements made in 2011 and 2021,respectively,and discuss the implications of the latest measurements on the stellar and binary evolution.

关 键 词：恒星级黑洞 天鹅座X-1 三角视差 自旋 动力学方法 

分 类 号：P145.8[天文地球—天体物理]