期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 381, 期 1, 页码 L89-L93出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1745-3933.2007.00374.x
关键词
methods : N-body simulations; ISM : clouds; galaxies : ISM
Simulations of an isolated Milky Way-like galaxy, in which supernovae power a galactic fountain, reproduce the observed velocity and 21-cm brightness statistics of galactic neutral hydrogen (H I). The simulated galaxy consists of a thin H I disc, similar in extent and brightness to that observed in the Milky Way, and extra-planar neutral gas at a range of velocities due to the galactic fountain. Mock observations of the neutral gas resemble the H I flux measurements from the Leiden-Argentine-Bonn H I survey, including a high-velocity tail which matches well with observations of high-velocity clouds. The simulated high-velocity clouds are typically found close to the galactic disc, with a typical line-of- sight distance of 13 kpc from observers on the solar circle. The fountain efficiently cycles matter from the centre of the galaxy to its outskirts at a rate of around 0.5M(circle dot) yr(-1).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据