Momentum injection by clustered supernovae: testing subgrid feedback prescriptions
Momentum injection by clustered supernovae: testing subgrid feedback prescriptions
复制标题
簇状超新星的动量注入：测试亚网格反馈处方
DOI：
10.1093/mnras/stz3440
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发表时间：
2019
影响因子：
4.8
通讯作者：
M. Krumholz
中科院分区：
文献类型：
--
作者：
Eric S. Gentry;P. Madau;M. Krumholz
使用专门为评估来自单星团的多个时间分辨超新星(SNE)对周围介质的影响而设计的一维拉格朗日代码，我们测试了三个常用的反馈配方：延迟冷却(例如，在汽油-2代码中使用)、动量-能量注入(在动量主导的反馈和能量主导的反馈之间的分辨率依赖的转换，例如，在FIRE-2代码中使用)和同时能量注入(例如，在EAGLE模拟中使用)。我们的工作为这些配方提供了一种中间测试：我们分析了一种比简化场景更复杂的场景，许多场景都是为这些场景设计的，但比完整的银河系模拟更受控制。特别是，我们测试了这些模型在高分辨率(0.6pC；相对于孤立的SN情况的12倍增强)下模拟的11 SN星系团在低分辨率(20pC)下执行这些子网格配方时的增强动量效率。我们发现：(1)延迟冷却模型表现良好--当SNE聚集在一起，每个SN注入1051个ERG时，动量效率是基准孤立SN值的9倍，而在单个SN测试情况下，显然高估了动量效率；(2)动量-能量模型总是取得很好的结果，动量效率提高了5倍；(3)同时注入所有SNE的能量对防止过冷作用很小，并且大大不足产生集群SNE沉积的动量，导致动量效率平均下降3倍。
Using a 1D Lagrangian code specifically designed to assess the impact of multiple, time-resolved supernovae (SNe) from a single-star cluster on the surrounding medium, we test three commonly used feedback recipes: delayed cooling (e.g. used in the gasoline-2 code), momentum-energy injection (a resolution-dependent transition between momentum-dominated feedback and energy-dominated feedback used, e.g. in the fire-2 code), and simultaneous energy injection (e.g. used in the EAGLE simulations). Our work provides an intermediary test for these recipes: we analyse a setting that is more complex than the simplified scenarios for which many were designed, but one more controlled than a full galactic simulation. In particular, we test how well these models reproduce the enhanced momentum efficiency seen for an 11 SN cluster simulated at high resolution (0.6 pc; a factor of 12 enhancement relative to the isolated SN case) when these subgrid recipes are implemented in low resolution (20 pc) runs. We find that: (1) the delayed cooling model performs well – resulting in 9 times the momentum efficiency of the fiducial isolated SN value – when SNe are clustered and 1051 erg are injected per SN, while clearly overpredicting the momentum efficiency in the single SN test case; (2) the momentum-energy model always achieves good results, with a factor of 5 boost in momentum efficiency; and (3) injecting the energy from all SNe simultaneously does little to prevent overcooling and greatly underproduces the momentum deposited by clustered SNe, resulting in a factor of 3 decrease in momentum efficiency on the average.
影响因子：
4.8
作者：
Coral Wheeler;P. Hopkins;A. Pace;S. Garrison-Kimmel;M. Boylan-Kolchin;A. Wetzel;J. Bullock;D. Keres
通讯作者：
Coral Wheeler;P. Hopkins;A. Pace;S. Garrison-Kimmel;M. Boylan-Kolchin;A. Wetzel;J. Bullock;D. Keres