Interacting galaxies and mergers

Details Interacting galaxies and mergers Interacting galaxies and mergers

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.199..189c&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 199, no. 2, p. 189-197.

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2

Galactic Evolution, Interacting Galaxies, Astronomical Models, Computational Astrophysics, Galactic Halos, Galactic Structure, Gravitational Effects, Milky Way Galaxy

Scientific paper

A study of the merger time-scales of various types of interacting galaxies is conducted on the basis of the collisional theory. The results indicate that in the absence of halos, violently interacting galaxies merge about in a time-scale of about 10 exp 8 years; but the mildly interacting ones have merger time-scales from about 10 exp 9 to 10 exp 10 years. However, in the presence of halos, all types of interacting galaxies are likely to merge in a time-scale of less than about 10 exp 8 yrs. Galaxy evolution by mutual interactions is likely to have its reflection on the fundamental plane, as during the process the dynamical structures of the progenitors change and dissipation occurs.

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