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arXiv 1111.3982astro-ph.CO
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星爆后星系外流的隐藏质量和大空间范围

The Hidden Mass and Large Spatial Extent of a Poststarburst Galaxy Outflow

Todd M. Tripp, Joseph D. Meiring, J. Xavier Prochaska, Christopher N. A. Willmer, J. Christopher Howk, Jessica K. Werk, Edward B. Jenkins, David V. Bowen, Nicol… 展开作者

Todd M. Tripp, Joseph D. Meiring, J. Xavier Prochaska, Christopher N. A. Willmer, J. Christopher Howk, Jessica K. Werk, Edward B. Jenkins, David V. Bowen, Nicolas Lehner, Kenneth R. Sembach, Christopher Thom, Jason Tumlinson

摘要:

多相等离子体的外流风被提出来调节星系的形成,但这些外流的关键方面还没有被观测到。利用紫外吸收光谱,我们发现,在10^{5.5} K的“温暖-热”等离子体包含10-150倍的质量比冷气体在一个poststarburst星系风。这种风延伸到>68千秒差距的距离,至少有一部分会逃逸。此外,冷相和暖-热相的运动学相关性表明,暖-热等离子体与>>10^{6} K的冷物质与更热(看不见的)相的相互作用有关。这种多相风可以移除大量的质量,并改变星暴后星系的演化。

英文摘要:

Outflowing winds of multiphase plasma have been proposed to regulate the buildup of galaxies, but key aspects of these outflows have not been probed with observations. Using ultraviolet absorption spectroscopy, we show that "warm-hot" plasma at 10^{5.5} K contains 10-150 times more mass than the cold gas in a poststarburst galaxy wind. This wind extends to distances >68 kiloparsecs, and at least some portion of it will escape. Moreover, the kinematical correlation of the cold and warm-hot phases indicates that the warm-hot plasma is related to the interaction of the cold matter with a hotter (unseen) phase at >>10^{6} K. Such multiphase winds can remove substantial masses and alter the evolution of poststarburst galaxies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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