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Date and Time of the Query: 2019-05-20 T15:47:46 PDT
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For refcode 2011AJ....142..137C:
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2011AJ....142..137C The Origin of Neutral Hydrogen Clouds in Nearby Galaxy Groups: Exploring the Range of Galaxy Interactions Chynoweth, Katie M.; Holley-Bockelmann, Kelly; Polisensky, Emil; Langston, Glen I. Abstract. We combine high-resolution N-body simulations with deep observations of neutral hydrogen (H I) in nearby galaxy groups in order to explore two well-known theories of H I cloud formation: H I stripping by galaxy interactions and dark-matter minihalos with embedded H I gas. This paper presents new data from three galaxy groups---Canes Venatici I, NGC 672, and NGC 45---and assembles data from our previous galaxy group campaign to generate a rich H I cloud archive to compare to our simulated data. We find no H I clouds in the Canes Venatici I, NGC 672, or NGC 45 galaxy groups. We conclude that H I clouds in our detection space are most likely to be generated through recent, strong galaxy interactions. We find no evidence of H I clouds associated with dark-matter halos above M_H I_ ~ 10^6^ M_sun_, within +/-700 km s^--1^ of galaxies, and within 50 kpc projected distance of galaxies. Key words: dark matter, evolution, galaxies: evolution, galaxies: interactions, ISM: clouds, radio lines: galaxies
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