The Fate of Supernova-heated Gas in Star-forming Regions of the LMC: Lessons for Galaxy Formation?
The Fate of Supernova-heated Gas in Star-forming Regions of the LMC: Lessons for Galaxy Formation?
复制标题
LMC 恒星形成区超新星加热气体的命运：星系形成的教训？
DOI：
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发表时间：
2018
影响因子：
4.9
通讯作者：
J. Gallagher
中科院分区：
文献类型：
--
作者：
Chad Bustard;S. Pardy;E. D’Onghia;E. Zweibel;J. Gallagher
由超新星加热的气体驱动的星系风和喷泉在重新分配星系中的气体，在环星系介质中沉积金属以及淬灭星星形成方面发挥着不可或缺的作用。由于星系在周围介质中的运动，这些外流和冲压压力剥离（RPS）之间的相互作用可能会通过将喷泉流转换为喷出的气体来增强这些效应。在本文中，我们提出了控制，三维模拟RPS结合热驱动，本地流出的集群超新星在一个孤立的磁盘星系的大麦哲伦云（LMC），银河系的矮卫星在其第一次降落。从LMC的超巨星壳层中产生的局部外流和来自这些区域的H i气体的拖尾细丝的观测证据-没有明显的主导臂对应物-可能是这个过程的一个完美的例子。我们的模拟提出了一个概念证明，冲压压力可以转换成喷出的气体喷泉流。我们发现，喷泉附近的LMC的峰值星星形成时间可以包括部分的LMC灯丝的尾流，但较低的柱密度比观察到的。从LMC流出的更大、更多的气体可能会产生更多的质量，但惯性更大的气体将延长这些气体被冲压压力冲走的时间。鉴于高分辨率的观测，增加知识的星星形成的历史，和越来越多的证据多相电离外流，大麦哲伦星云是一个理想的测试平台，为未来的风模型。
Galactic winds and fountains driven by supernova-heated gas play an integral role in redistributing gas in galaxies, depositing metals in the circumgalactic medium, and quenching star formation. The interplay between these outflows and ram-pressure stripping (RPS) due to the galaxy’s motion through an ambient medium may enhance these effects by converting fountain flows into expelled gas. In this paper, we present controlled, 3D simulations of RPS combined with thermally driven, local outflows from clustered supernovae in an isolated disk galaxy modeled on the Large Magellanic Cloud (LMC), a dwarf satellite of the Milky Way on its first infall. Observational evidence of local outflows emanating from supergiant shells in the LMC and a trailing filament of H i gas originating from these regions—with no obvious Leading Arm counterpart—may represent a perfect example of this process. Our simulations present a proof of concept that ram pressure can convert fountain flows into expelled gas. We find that fountains launched near the peak star formation time of the LMC can comprise part of the LMC filament in the Trailing Stream but with lower column densities than observed. Larger, more numerous outflows from the LMC may be possible and may contribute more mass, but higher-inertia gas will lengthen the timescale for this gas to be swept away by ram pressure. Given the high-resolution observations, increased knowledge of star formation histories, and growing evidence of multiphase ionized outflows, the LMC is an ideal test bed for future wind models.
DOI：
10.1111/j.1365-2966.2006.10335.x
发表时间：
2006
影响因子：
4.8
作者：
Roediger;Brüggen
通讯作者：
Brüggen