期刊
SCIENCE
卷 334, 期 6058, 页码 952-955出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1209850
关键词
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资金
- NASA through the Space Telescope Science Institute [11741]
- NASA [NAS5-26555, NNX08AJ44G]
- NSF [AST 95-29098, 00-711098, 05-07483, 08-08133, 00-71048, 05-07428, 08-07630]
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Japanese Monbukagakusho
- Max Planck Society
- NASA [NNX08AJ44G, 100420] Funding Source: Federal RePORTER
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. By using ultraviolet absorption spectroscopy, we show that warm-hot plasma at 10(5.5) kelvin contains 10 to 150 times more mass than the cold gas in a post-starburst 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) kelvin. Such multiphase winds can remove substantial masses and alter the evolution of post-starburst galaxies.
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