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Probing Galaxy Formation with High Energy Gamma-Rays
Joel R. Primack, Rachel S. Somerville, James S. Bullock +1
We discuss how measurements of the absorption of -rays from GeV to TeV energies via pair production on the extragalactic background light (EBL) can probe important issues in gal…
Spin Profile of Galactic Halos and Disk Formation
A. Dekel, J. S. Bullock, C. Porciani +4
We summarize recent developments in the study of the origin of halo spin profiles and preliminary implications on disk formation. The specific angular-momentum distributions within…
Origin and Destiny of Dark Matter Halos: Cosmological Matter Exchange and Metal Enrichment
Tsafrir S. Kolatt, James S. Bullock, Avishai Dekel +4
[Abridged] We analyze the exchange of dark matter between halos, subhalos, and their environments in a high-resolution cosmological N-body simulation of a Lambda CDM cosmology. At…
Interaction rates of dark-matter halos and subhalos
Tsafrir S. Kolatt, James S. Bullock, Yair Sigad +4
[Abridged] The interaction rates of dark-matter halos and subhalos, are computed using high-resolution cosmological N-body simulations of the Lambda-CDM model. Although the number…
Hierarchical galaxy formation and substructure in the Galaxy's stellar halo
James S. Bullock, Andrey V. Kravtsov, David H. Weinberg
We develop an explicit model for the formation of the stellar halo from tidally disrupted, accreted dwarf satellites in the cold dark matter (CDM) framework, focusing on prediction…
Resolving the Structure of Cold Dark Matter Halos II
Anatoly Klypin, Andrey V. Kravtsov, James Bullock +1
We study the effects of mass and force resolution on the density profiles of galaxy-size Cold Dark Matter (CDM) halos in a flat, low-density cosmological model with vacuum energy.…