Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19713505b&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #135.05; Bulletin of the American Astronomical Society, Vol. 33, p.723
Astronomy and Astrophysics
Astronomy
Scientific paper
The effect of subclusters on the development of cD galaxies and the cluster environment is investigated through the use of N-body simulations. The cluster simulations are fully self-consistent with each galaxy represented by a distribution of particles, and the gravitational potential of the cluster as a whole arises from the distribution particles alone. All simulations are carried out using a parallelized ``tree'' algorithm (Dubinski 1996). The computer simulations consist of five single-cluster models and five cluster-merger models. The single-cluster models contain 50 galaxies which are represented by N=80,000 particles. The cluster-crash models consist of two 50-galaxy, single-cluster models on a sub-parabolic glancing collision and are represented by N=160,000 particles. Results show that the production of a central dominant galaxy is the natural product of the cluster simulations and the cluster-merger models. In fact the cluster-merger models are more conducive to producing a more massive central dominant galaxy than the single-cluster models even though the cluster-merger models show a lower rate of galaxy merging than the single-cluster models.
Berrington Robert Charles
Cohn Haldan N.
Lugger Phyllis Minnie
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