论文标题
TDE的系统光曲线建模：光谱类别之间的统计差异
Systematic light curve modelling of TDEs: statistical differences between the spectroscopic classes
论文作者
论文摘要
随着观察到的潮汐破坏事件的样本（TDE）现在达到了几个数十个，出现了不同的光谱类别：仅具有氢管线（TDE-H），仅氦系（TDE-HE）或与HE II结合使用的TDE，通常是NIII/O III/O III（TDE-H+He）。在这里，我们使用模块化开源钳工（MOSFIT）对32个光亮TDE的光曲线进行建模，以估计物理和轨道性质，并寻找光谱类别之间的统计差异。对于所有类型，与典型的初始质量功能相比，我们发现星质量的浅分布，$ \ sim 0.1-1 $ m $ _ \ odot $，而没有非常深的TDE（$β\ gg 1 $）相遇。我们的主要结果是，TDE-H事件似乎比TDE-H+He少于完全的破坏（可能较低的SMBH群众），而TDE-HE事件完全破坏了。我们还发现，TDE-H事件与最近的文献一致，并认为这可能是碎片流的自我交流半径差异的结果。最后，我们确定了黑洞质量和辐射效率之间的近似线性相关性。我们建议TDE-H可能是在相对较大的半径上通过碰撞引起的流出动力的，而TDE-H+可能是由迅速的积聚磁盘造成的，在更大较大的SMBHS周围更紧密的相遇中形成了更有效的形成。
With the sample of observed tidal disruption events (TDEs) now reaching several tens, distinct spectroscopic classes have emerged: TDEs with only hydrogen lines (TDE-H), only helium lines (TDE-He), or hydrogen in combination with He II and often N III/O III (TDE-H+He). Here we model the light curves of 32 optically-bright TDEs using the Modular Open Source Fitter for Transients (MOSFiT) to estimate physical and orbital properties, and look for statistical differences between the spectroscopic classes. For all types, we find a shallow distribution of star masses, compared to a typical initial mass function, between $\sim 0.1-1$ M$_\odot$, and no TDEs with very deep ($β\gg 1$) encounters. Our main result is that TDE-H events appear to come from less complete disruptions (and possibly lower SMBH masses) than TDE-H+He, with TDE-He events fully disrupted. We also find that TDE-H events have more extended photospheres, in agreement with recent literature, and argue that this could be a consequence of differences in the self-intersection radii of the debris streams. Finally, we identify an approximately linear correlation between black hole mass and radiative efficiency. We suggest that TDE-H may be powered by collision-induced outflows at relatively large radii, while TDE-H+He could result from prompt accretion disks, formed more efficiently in closer encounters around more massive SMBHs.
