Dynamics of merging spirals and Lambda CDM merger trees

Details Dynamics of merging spirals and Lambda CDM merger trees Dynamics of merging spirals and Lambda CDM merger trees

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..17..133h&link_type=abstract

Galaxy Evolution: Theory & Observations (Eds. Vladimir Avila-Reese, Claudio Firmani, Carlos S. Frenk & Christine Allen) Revista

Astronomy and Astrophysics

Astronomy

Galaxies: Formation, Galaxies: Interactions, Galaxies: Evolution

Scientific paper

We run a series of SPH simulations to estimate the time it takes for the disks of two spiral galaxies of similar masses to fuse into a single relaxed spheroid. This timescale can then be compared to the time interval preceding an observed elliptical galaxy, observed at a certain redshift, within which a major merger is limited to have occurred, within the standard Press-Schechter theory. This comparison yields a limit mass, at every observation redshift, above which an elliptical galaxy could not have been the result of a major merger.

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