期刊
SCIENCE
卷 368, 期 6491, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aba4356
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资金
- NASA [80NSSC20K0531, NAS5-26555]
- Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE) by NSF [PHY 14-30152]
- Research Corporation [24216]
- NSF [AST 19-09022, AST-1515927, AST-181440, AST-1907570]
- NASA Hubble Fellowship grant by the Space Telescope Science Institute [51424]
Van den Heuvel and Tauris argue that if the red giant star in the system 2MASS J05215658+4359220 has a mass of 1 solar mass (M-circle dot), then its unseen companion could be a binary composed of two 0.9 M. stars, making a triple system. We contend that the existing data are most consistent with a giant of mass 3.2(-1.0)(+1.0) M-circle dot, implying a black hole companion of 3.3(-0.7)(+2.8) M-circle dot
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