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Astron. Astrophys. 327, 921-929

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Mergers of galaxies in clusters: Monte Carlo simulation
of mass and angular momentum distribution

D.S. Krivitsky and V.M. Kontorovich

Institute of Radio Astronomy, Krasnoznamennaya 4, 310002, Kharkov, Ukraine (e-mail: rai@ira.kharkov.ua)

Received 16 September 1996 / Accepted 14 February 1997


A Monte Carlo simulation of mergers in clusters of galaxies is carried out. An ``explosive'' character of the merging process (an analog of phase transition), suggested earlier by Cavaliere et al. (1991), Kontorovich et al. (1992), is confirmed. In particular, a giant object similar to cD-galaxy is formed in a comparatively short time as a result of mergers. Mass and angular momentum distribution function for galaxies is calculated. An intermediate asymptotics of the mass function is close to a power law with the exponent $\alpha\approx2$. It may correspond to recent observational data for steep faint end of the luminosity function. The angular momentum distribution formed by mergers is close to Gaussian, the rms dimensionless angular momentum S/(GM3R)1/2 being approximately independent of mass, which is in accordance with observational data.

Key words: galaxies: clusters: general - galaxies: cD - galaxies: interactions - galaxies: mass function - galaxies: statistics

Send offprint requests to: D.S. Krivitsky

© European Southern Observatory (ESO) 1997

Online publication: October 20, 1997
Last change: April 6, 1998