星暴后星系外流的隐藏质量与巨大空间延展
宇宙学与河外天体物理
2015-06-03 v1
摘要
多相等离子体的外流风被认为能调节星系的组装，但这些外流的关键方面尚未得到观测探测。利用紫外吸收光谱学，我们表明星暴后星系风中温度为 10^{5.5} K 的“温热”等离子体所含质量是冷气体的 10-150 倍。该风延伸至 >68 千秒差距的距离，且至少有一部分将逃逸出去。此外，冷相与温热相的动力学相关性表明，温热等离子体与冷物质和更热（不可见）的 >>10^{6} K 相的相互作用有关。这种多相风可以移除大量质量并改变星暴后星系的演化。
引用
@article{arxiv.1111.3982,
title = {The Hidden Mass and Large Spatial Extent of a Poststarburst Galaxy Outflow},
author = {Todd M. Tripp and Joseph D. Meiring and J. Xavier Prochaska and Christopher N. A. Willmer and J. Christopher Howk and Jessica K. Werk and Edward B. Jenkins and David V. Bowen and Nicolas Lehner and Kenneth R. Sembach and Christopher Thom and Jason Tumlinson},
journal= {arXiv preprint arXiv:1111.3982},
year = {2015}
}
备注
This paper is part of a set of three papers on circumgalactic gas observed with the Cosmic Origins Spectrograph on HST, to be published in Science, together with related papers by Tumlinson et al. and Lehner & Howk, in the November 18, 2011 edition. This version has not undergone final copyediting. Please see Science online for the final printed version