论文标题
影响参数对潮汐破坏事件的影响
The Effect of Impact Parameter on Tidal Disruption Events
论文作者
论文摘要
太接近超级质量黑洞的恒星被黑洞的潮汐重力破坏了，并导致剩余的积聚到黑洞时会弹出一些碎屑。为了更好地研究这种碎片的物理学，我们使用移动的网格代码漫画遵循恒星从最初的相遇到完全破坏的恒星的演变。通过改变恒星的冲击参数（$β$），我们研究了剩余材料的能量分布以及材料的后备速率随时间的函数。我们表明，能量在碎片和峰值光度时间（$ t _ {\ rm peak} $）中的传播都与冲击参数直接相关。特别是，我们发现$β^{1/2} $缩放为$β= 2-10 $的能量扩散，而$β\ gtrsim 10 $的冷冻演化。我们讨论了这种缩放对这些较低$β$的光曲线的上升时间的含义和光度峰值的宽度。这些关系提供了推断观察到的TDE的影响参数的可能手段。
Stars that pass too close to a supermassive black hole are disrupted by the black hole's tidal gravity and leads to some debris being ejected while the remainder accretes into the black hole. To better study the physics of this debris, we use the moving mesh code MANGA to follow the evolution of the star from its initial encounter to its complete destruction. By varying the impact parameter ($β$) of the star, we studied the energy distribution of the remaining material and the fallback rate of the material into the black hole as a function of time. We show that the spread of energy in the debris and peak luminosity time ($t_{\rm peak}$) are both directly related to the impact parameter. In particular, we find a $β^{1/2}$ scaling for the energy spread for $β=2-10$ and a frozen evolution for $β\gtrsim 10$. We discuss implication of this scaling for the rise time of the light curve and broadness of the luminosity peak for these lower $β$'s. These relationships provide a possible means of inferring the impact parameters for observed TDEs.
