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Date and Time of the Query: 2019-05-20 T00:52:45 PDT
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For refcode 2000ApJ...542..137H:
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2000ApJ...542..137H Identifying Old Tidal Dwarf Irregulars Deidre A. Hunter, Sally D. Hunsberger, and Erin W. Roye Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001; dah@lowell.edu, sdh@lowell.edu, erin.roye@yale.edu Received 2000 April 27; accepted 2000 May 1 ABSTRACT We examine the observational consequences of the two possible origins for irregular galaxies: formation from collapse of a primordial cloud of gas early in the age of the universe, or formation from tidal tails in an interaction that could have occurred any time in the history of the universe. Because the formation from tidal tails could have occurred a long time ago, proximity to larger galaxies is not sufficient to distinguish tidal dwarfs from traditional dwarfs. We consider the effects of little or no dark matter on rotation speeds and the Tully-Fisher relationship, the metallicity-luminosity relationship, structure, and stellar populations. From these selection criteria, we identify a small list of dwarf irregular galaxies that are candidates for having formed as tidal dwarfs. Subject headings: galaxies: evolution-galaxies: formation-galaxies: interactions-galaxies: irregular
Retrieve 21 NED objects in this reference.
Please click here for ADS abstract

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