论文标题
近距离潮汐是否引起了Betelgeuse的巨大变化？
Did a close tidal encounter cause the Great Dimming of Betelgeuse?
论文作者
论文摘要
我们评估重力变黑是否在恒星飞行过程中引起的潮汐相互作用引起的重力可能足以解释贝特尔吉（Betelgeuse）的巨大变暗。采用几个简单的近似值，我们计算了在近距离潮汐相遇中的潮汐变形和相关的重力变暗，以及远处观察者所看到的辐射通量的减小。我们表明，原则上，可以使用所得恒星调光的持续时间和程度来估计最小的折缘物分离和飞行物体的质量，即使它仍然未被发现，也可能是黑洞，中子星或白矮人。我们的估计表明，尽管此类飞行事件可能发生在其他天体物理场景中，但我们的分析应该适用，但它们可能不足以解释Betelgeuse的巨大变化。
We assess whether gravity darkening, induced by a tidal interaction during a stellar fly-by, might be sufficient to explain the Great Dimming of Betelgeuse. Adopting several simple approximations, we calculate the tidal deformation and associated gravity darkening in a close tidal encounter, as well as the reduction in the radiation flux as seen by a distant observer. We show that, in principle, the duration and degree of the resulting stellar dimming can be used to estimate the minimum pericenter separation and mass of a fly-by object, which, even if it remains undetected otherwise, might be a black hole, neutron star, or white dwarf. Our estimates show that, while such fly-by events may occur in other astrophysical scenarios, where our analysis should be applicable, they likely are not large enough to explain the Great Dimming of Betelgeuse by themselves.
