MOCCA-SURVEY Database I: tidal disruption events of white dwarfs in globular clusters and young mass clusters
MOCCA-SURVEY Database I: tidal disruption events of white dwarfs in globular clusters and young mass clusters
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DOI：
10.1093/mnras/stac2000
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发表时间：
2021-03
影响因子：
4.8
通讯作者：
A. Tanikawa;M. Giersz;Manuel Arca Sedda-Manuel-Arca Sedda-2126255607
中科院分区：
文献类型：
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作者：
A. Tanikawa;M. Giersz;Manuel Arca Sedda-Manuel-Arca Sedda-2126255607
我们利用 mocca Survey Database I 中的 1000 多个星团蒙特卡罗模型来推断球状星团 (GC) 和年轻大质量星团 (YMC) 中白矮星 (WD) 潮汐破坏事件 (TDE) 的局部速率密度。我们认为，本地宇宙中 GC 和 YMC 的 WD TDE 率为 ∼90–500 yr−1 Gpc−3，其中 90% 的 WD TDE 发生在 GC 中。总 WD TDE 速率密度比之前估计的大约 9-50 倍。我们的结果表明，通过下一代光学巡天，例如维拉·C·鲁宾天文台的遗留时空巡天，可以以~100–550 yr−1的速率观测到由WD TDE引起的热核爆炸。我们还发现，大规模的 WD 由于质量分离而优先被破坏，并且 20% 爆炸的 WD 的质量 $\gtrsim 1.0 \, {\rm M}_\odot$ 尽管此类 WD 的数量很少。
We exploit more than 1000 star cluster Monte Carlo models from the mocca Survey Database I, to infer the local rate density of white dwarf (WD) tidal disruption events (TDEs) in globular clusters (GCs) and young massive clusters (YMCs). We suggest that the WD TDE rate for GCs and YMCs in the local Universe is ∼90–500 yr−1 Gpc−3, with 90 per cent of WD TDEs occurring in GCs. The total WD TDE rate density is ∼9–50 times larger than estimated previously. Our results show that thermonuclear explosions induced by WD TDEs can be observed at a rate of ∼100–550 yr−1 by the next generation optical surveys, such as the Legacy Survey of Space & Time by the Vera C. Rubin Observatory. We also find that massive WDs are preferentially disrupted as a result of mass segregation, and that 20 per cent of exploding WDs have mass$\gtrsim 1.0 \, {\rm M}_\odot$ despite the small population of such WDs.