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The main goal of this paper is to compare the relative importance ofdestruction by tides, vs. destruction by mergers, in order to assess if tidaldestruction of dwarf galaxies in clusters is a viable scenario for explainingthe origin of intracluster stars. We have designed a simple algorithm forsimulating the evolution of isolated clusters. The distribution of galaxies inthe cluster is evolved using a direct gravitational N-body algorithm combinedwith a subgrid treatment of physical processes such as mergers, tidaldisruption, and galaxy harassment. Using this algorithm, we have performed atotal of 227 simulations. Our main results are (1) destruction of dwarfgalaxies by mergers dominates over destruction by tides, and (2) thedestruction of dwarf galaxies by tides is sufficient to explain the observedintracluster light in clusters.

The Fate of Dwarf Galaxies in Clusters and the Origin of Intracluster Stars. I. Isolated Clusters