Other
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc...38h&link_type=abstract
Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam
Other
Scientific paper
We simulate formation and evolution of a cloud system in a gas rich dwarf galaxy. Since there are no spiral density waves in gas rich dwarf galaxies, we can study star formation mode without spiral density waves in gas rich dwarfs. In this study, evolution of a cloud system must be very important. In our simulation we calculate formation of clouds from interstellar medium and their evolution due to merging of clouds in a rotating gas disk. We assume isothermal gas with low temperature and two types of rotation curves, a rigid rotation and a flat rotation. Time evolution of the gas disk is as follows. At first, small clouds of which mass corresponds to the Jeans mass of initial interstellar medium are formed and mass of clouds increases with time due to merging of clouds up to 106 Modot. In this stage, low density regions with a scale of several hundred pc are formed. We obtain cloud mass functions from our numerical results. The cloud mass function is well approximated with a log-normal function.
Fukuda Hiroshi
Habe Asao
Tokumaru Munetoshi
Wada Keiichi
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