Davoudiasl Hooman, Denton Peter B
Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA.
Phys Rev Lett. 2019 Jul 12;123(2):021102. doi: 10.1103/PhysRevLett.123.021102.
The initial data from the Event Horizon Telescope (EHT) on M87^{}, the supermassive black hole at the center of the M87 Galaxy, provide direct observational information on its mass, spin, and accretion disk properties. A combination of the EHT data and other constraints provides evidence that M87^{} has a mass ∼6.5×10^{9} M_{⊙}. EHT also inferred the dimensionless spin parameter |a^{}|≳0.5 from jet properties; a separate recent analysis using only the light from near M87^{} as measured by the EHT Collaboration found |a^{}|=0.9±0.1. These determinations disfavor ultralight bosons of mass μ_{b}∈(0.85,4.6)×10^{-21} eV for spin-one bosons and μ_{b}∈(2.9,4.6)×10^{-21} eV for spin-zero bosons, within the range considered for fuzzy dark matter, invoked to explain dark matter distribution on approximately kiloparsec scales. Future observations of M87^{} could be expected to strengthen our conclusions.
来自事件视界望远镜（EHT）对M87星系中心超大质量黑洞M87的初始数据，提供了关于其质量、自旋和吸积盘特性的直接观测信息。EHT数据与其他限制条件相结合，证明M87的质量约为6.5×10⁹M⊙。EHT还从喷流特性推断出无量纲自旋参数|a*|≳0.5；最近一项单独分析仅利用EHT合作组织测量的M87附近的光线，发现|a| = 0.9±0.1。这些测定结果不支持质量为μb∈(0.85,4.6)×10⁻²¹ eV的自旋为1的玻色子以及质量为μb∈(2.9,4.6)×10⁻²¹ eV的自旋为0的玻色子，这是在用于解释大约千秒差距尺度上暗物质分布的模糊暗物质所考虑的范围内。预计未来对M87*的观测将强化我们的结论。
