Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..204l&link_type=abstract
Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July
Astronomy and Astrophysics
Astronomy
Scientific paper
We show results of N-body simulations of compact groups of 5 spiral galaxies each with a population of 300 GCs initially distributed as in in the Milky Way. Each host galaxy loses during the evolution up to 50% of its GCs depending on the encounter/merging properties. The radial surface density of the GC population in each host gets flatter during strong interactions and mergings but steepens after shallow interactions. A population of intra-group GCs indeed forms. The GCs can reach a distance of a few hundred kpc from the group center depending on their concentration and on the encounter/merger rate of the host galaxy. Their global spatial distribution shows extended streams as we observed in HCG90 where we found 150 GCs outside the galaxies. The radial velocity distribution of the intra-group GCs exhibits asymmetrical wings in the compact groups with lower interaction rate indicating the existence of a multiple GC dynamical population. The GC population can be used as a [Truncated.]
Athanassoula Evangelia
Bergond Gilles
Del Olmo Ascension
Garcia Gomez C.
Leon Stephane
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