Close Galaxy Counts as a Probe of Hierarchical Structure Formation
The standard ΛCDM model predicts that the major merger rate of galaxy-size dark matter halos rises rapidly with redshift. The average number of close companions per galaxy, Nc, is often used to infer the galaxy merger rate; however, recent observational studies suggest that Nc evolves very little with redshift. Here we use a ``hybrid'' N-body
Berrier, Joel C. et al.
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11
2006