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【9.3】2019年高能所粒子天体中心系列学术报告 # 9:Masses of Stellar Black Holes
2019-08-30 | 【

  时间:9月3日(周二)14:00-17:00 

  地点:多学科大楼416

  报告人:Prof. Roberto Soria(NAOC/UCAS/University of Sydney)

  主持人:杨怡蓉 副研究员

  题目:Masses of Stellar Black Holes

  摘要:

  Kinematic mass measurements of Galactic black holes give masses between 5 and 15 times solar. However, that is based on a small sample of about 20 black holes in bright X-ray binaries. It may not be representative of the true distribution of stellar black hole masses and may bias theoretical models of core collapse supernovae. Ultraluminous X-ray sources might show a population of heavier stellar mass black holes in the local universe; however, so far there is no direct evidence to support this speculation. LIGO merger events do prove the existence of stellar black holes of a few 10s of solar masses, but the merger progenitors cannot be directly confirmed with spectroscopic observations. A breakthrough with the first kinematic mass measurement of a heavy stellar black hole comes from a Galactic binary system, recently discovered by our NAOC team from a LAMOST survey. I will present the evidence for the unusually heavy black hole mass and invite a discussion of possible scenarios.

  


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