Formation of dwarf galaxies in tidal tails

Details Formation of dwarf galaxies in tidal tails Formation of dwarf galaxies in tidal tails

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.360..715b&link_type=abstract

Nature (ISSN 0028-0836), vol. 360, no. 6406, p. 715-717.

Physics

210

Disk Galaxies, Dwarf Galaxies, Elliptical Galaxies, Galactic Evolution, Interacting Galaxies, Dark Matter, Digital Simulation, Interstellar Gas, Mass To Light Ratios, Tides

Scientific paper

The results are reported of numerical simulations of encounters between disk galaxies, each modeled with a central bulge, an exponential disk, and a spheroidal dark-matter halo. It is found that dwarf systems form in material drawn out during the encounter; these objects can capture large amounts of moderately enriched gas but retain little dark matter from their parents' haloes. They should therefore have lower mass-to-light ratios than galaxies formed directly by the collapse of primordial matter.

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