Massive central galaxies, globular cluster swapping, and tidal accretion

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Accretion Disks, Galactic Clusters, Galactic Evolution, Globular Clusters, Star Distribution, Celestial Mechanics, Galactic Structure, Tides

Scientific paper

The results of numerical simulations of clusters of galaxies which have globular clusters orbiting around them are used to investigate the role of massive central galaxies in globular cluster swapping. Those galaxies tend to lose globular clusters rather than gain them: on the average, after 10-billion yr, they lose more than 70 percent of their globulars, but those that they capture help to lower the total loss to less than 20 percent; in other words, in addition to mergers, tidal accretion helps massive galaxies to balance losses due to tidal stripping. The globulars that the galaxy retains expand their orbits and, as the captured globulars also end up far from the galactic center, a very extended structure is the final result.

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