论文标题
黑洞高旋转x-1的高临界积聚
Hypercritical Accretion for Black Hole High Spin in Cygnus X-1
论文作者
论文摘要
最近对Adligo和处女座的观察结果表明，二进制黑洞（BH）系统中的自旋测量通常很小，这与经典隔离的二进制二进制进化通道的预测一致。在这个标准的地层通道中，假定BH的祖先具有有效的角动量转运。但是，已经发现，在高质量X射线二进制文件（HMXB）中的BH旋转始终被发现非常高。为了解释高BH旋转，需要在BH祖细胞内的角动量转运效率低下。但是，这一要求与当前对常规有效角动量传输机制的理解不相容。我们发现，只要允许超临界增值，就可以高度缓解这种张力。我们表明，对于Cygnus X-1的案例研究，超临界物质不仅是对巨大恒星内角动量转运不一致的假设的好解决方案，而且还匹配其最近报道的其他特性。
Recent observations of AdLIGO and Virgo have shown that the spin measurements in binary black hole (BH) systems are typically small, which is consistent with the predictions by the classical isolated binary evolution channel. In this standard formation channel, the progenitor of the first-born BH is assumed to have efficient angular momentum transport. The BH spins in high-mass X-ray binaries (HMXBs), however, have been found consistently to be extremely high. In order to explain the high BH spins, the inefficient angular momentum transport inside the BH progenitor is required. This requirement, however, is incompatible with the current understanding of conventional efficient angular momentum transport mechanism. We find that this tension can be highly alleviated as long as the hypercritical accretion is allowed. We show that, for a case study of Cygnus X-1, the hypercritical accretion cannot only be a good solution for the inconsistent assumption upon the angular momentum transport within massive stars, but match its other properties reported recently.
