Mushroom-shaped Structures as Tracers of Buoyant Flow in the Galactic Disk
Mushroom-shaped Structures as Tracers of Buoyant Flow in the Galactic Disk
复制标题
蘑菇状结构作为银盘浮力流的示踪剂
DOI：
10.1086/319842
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. M. Low
中科院分区：
文献类型：
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作者：
M. D. Avillez;M. M. Low
最近对银河系南半球的H I辐射观测发现了一个蘑菇状结构，从z = −70到−450 pc，由一个茎和一个帽组成。类似的结构也出现在由孤立的和成团的超新星驱动的动态星系盘的三维模拟中。使用这些模拟，我们表明，在银河系磁盘中的热气体，没有通过烟囱疏散膨胀到较冷的气体厚盘，形成蘑菇状结构。这类新的物体追踪了热气体进入厚盘的浮力流。
Recent H I emission observations of the southern Galactic hemisphere have revealed a mushroom-like structure extending from z = −70 to −450 pc, composed of a stem and a cap. Similar structures occur in three-dimensional simulations of a dynamic galactic disk driven by isolated and clustered supernovae. Using these simulations, we show that hot gas in the Galactic disk that is not evacuated through chimneys expands into the cooler gas of the thick disk, forming mushroom-shaped structures. This new class of objects traces buoyant flow of hot gas into the thick disk.