论文标题
潮汐破坏事件中的相对论增生光盘
Relativistic accretion disc in tidal disruption events
论文作者
论文摘要
我们构建了一个依赖时间的相对论积聚模型，用于潮汐破坏事件（TDES），其粘度为$α-$，并且由气压主导的压力。我们还包括用于全部和部分中断的TDE的质量后备率$ \ dot {m} _f $，并假设输入的碎片在时间$ t_c $中形成了一个种子盘，由于插入量的质量增加了碎片碎屑，并通过积累到黑洞中的质量损失而增加。此外，我们为圆盘高度得出一个明确的形式，该形式取决于盘中的角动量参数。我们表明，由于增加质量，椎间盘的表面密度在初始时间增加，然后随着质量后备率降低而降低，这会导致圆盘质量$ M _ {\ rm d} $降低，而后期演变为$ M _ {\ rm d} \ propto t^{ - 1.05} $和$ m m _ {\ rm d} T^{ - 1.38} $分别用于全部和部分中断TDE，其中$ t $是时间参数。降压光度$ l $显示出上升和下降，在$ l \ propto t^{ - 1.8} $和$ l \ propto t^{ - 2.3} $分别用于全部和部分破坏的后期。我们获得的光度比使用$ l \ propto \ dot {m} _f $推断出的光度快。我们还计算各种光谱带中的光曲线。
We construct a time-dependent relativistic accretion model for tidal disruption events (TDEs) with an $α-$viscosity and the pressure dominated by gas pressure. We also include the mass fallback rate $\dot{M}_f$ for both full and partial disruption TDEs, and assume that the infalling debris forms a seed disc in time $t_c$, which evolves due to the mass addition from the infalling debris and the mass loss via accretion onto the black hole. Besides, we derive an explicit form for the disc height that depends on the angular momentum parameter in the disc. We show that the surface density of the disc increases at an initial time due to mass addition, and then decreases as the mass fallback rate decreases, which results in a decrease in the disc mass $M_{\rm d}$ with a late-time evolution of $M_{\rm d} \propto t^{-1.05}$ and $M_{\rm d} \propto t^{-1.38}$ for full and partial disruption TDEs respectively, where $t$ is the time parameter. The bolometric luminosity $L$ shows a rise and decline that follows a power-law at late times given by $L \propto t^{-1.8}$ and $L \propto t^{-2.3}$ for full and partial disruption TDEs respectively. Our obtained luminosity declines faster than the luminosity inferred using $L \propto \dot{M}_f$. We also compute the light curves in various spectral bands.
