Other
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...412...90e&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 412, no. 1, p. 90-98.
Other
178
Astronomical Models, Dwarf Galaxies, Galactic Evolution, Interacting Galaxies, Interstellar Gas, Spiral Galaxies, H Alpha Line, Many Body Problem, Starburst Galaxies, Very Large Array (Vla)
Scientific paper
Ten H I clouds with masses larger than 10 exp 8 solar masses in the interacting galaxies IC 2163/NGC 2207 are identified. Twenty-eight other interacting pairs of galaxies with large knots or star formation structures in their optical images are also tabulated. It is suggested that interactions can lead to the formation of greater than 10 solar mass clouds and young stellar regions in the outer parts of galactic disks, and that some of these regions may become gravitationally bound dwarf galaxies if they are ejected in tidal arms. It is proposed that the key to the origin of clouds of greater than 10 exp 8 solar mass in interacting systems lies in the high velocity dispersion of the interstellar gas. Numerical N-body simulations of the interacting galaxies suggest that the complete detachment of an unbound dwarf galaxy requires a companion mass comparable to or larger than the galaxy mass.
Elmegreen Bruce G.
Kaufman Maike
Thomasson Magnus
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