论文标题
使用核星团的星系中的潮汐破坏事件率提高：从矮人到椭圆形
Enhancement of the tidal disruption event rate in galaxies with a nuclear star cluster: from dwarfs to ellipticals
论文作者
论文摘要
我们计算潮汐破坏事件（TDE）周围的局部大型黑洞（MBH），其质量低至$ 2.5 \ times10^4 {\ rm m} _ \ odot $，因此第一次探索了矮人的矮人。我们选择了37个星系的样品，其中我们具有表面恒星密度曲线，MBH质量的动态估计值，其中6个，包括我们的银河系，具有解析的核星簇（NSC）。对于银河系，我们发现$ \ sim 10^{ - 4} {\ rm yr}^{ - 1} $的总TDE速率在帐户中获取NSC时，$ \ sim 10^{ - 7} {\ rm yr yr}^{ - 1} $否则。 TDE主要来自NSC的光（$ <3 \ times 10^{10} {\ rm m} _ \ odot $）星系，其速率为$ 10^{ - 5} {\ rm yr yr}^{ - 1} $，以及最多可增强2阶的巨大量表与恒河的增强。我们使用不同的缩放关系组创建了模拟星系的模拟人群，以探索星系质量的趋势，并考虑到星系的成核分数。总体而言，我们发现$ 10^{ - 5} {\ rm yr}^{ - 1} $的速率比$ 10^{11} {\ rm m} _ \ odot $更大时会下降，它会降低，并包含MBHS吞咽星星，并导致整个吞咽星星。
We compute the tidal disruption event (TDE) rate around local massive black holes (MBHs) with masses as low as $2.5\times10^4 {\rm M}_\odot$, thus probing the dwarf regime for the first time. We select a sample of 37 galaxies for which we have the surface stellar density profile, a dynamical estimate of the mass of the MBH, and 6 of which, including our Milky Way, have a resolved nuclear star cluster (NSC). For the Milky Way, we find a total TDE rate of $\sim 10^{-4}{\rm yr}^{-1}$ when taking the NSC in account, and $\sim 10^{-7} {\rm yr}^{-1}$ otherwise. TDEs are mainly sourced from the NSC for light ($<3\times 10^{10}{\rm M}_\odot$) galaxies, with a rate of few $10^{-5}{\rm yr}^{-1}$, and an enhancement of up to 2 orders of magnitude compared to non-nucleated galaxies. We create a mock population of galaxies using different sets of scaling relations to explore trends with galaxy mass, taking into account the nucleated fraction of galaxies. Overall, we find a rate of few $10^{-5}{\rm yr}^{-1}$ which drops when galaxies are more massive than $10^{11}{\rm M}_\odot$ and contain MBHs swallowing stars whole and resulting in no observable TDE.
