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Evidence for Substructure in Ursa Minor Dwarf Spheroidal Galaxy using a Bayesian Object Detection Method
Andrew B. Pace, Gregory D. Martinez, Manoj Kaplinghat +1
We present a method for identifying localized secondary populations in stellar velocity data using Bayesian statistical techniques. We apply this method to the dwarf spheroidal gal…
Cosmological Simulations with Self-Interacting Dark Matter II: Halo Shapes vs. Observations
Annika H. G. Peter, Miguel Rocha, James S. Bullock +1
If dark matter has a large self-interaction scattering cross section, then interactions among dark-matter particles will drive galaxy and cluster halos to become spherical in their…
Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
Miguel Rocha, Annika H. G. Peter, James S. Bullock +4
We use cosmological simulations to study the effects of self-interacting dark matter (SIDM) on the density profiles and substructure counts of dark matter halos from the scales of…
Are Light Sterile Neutrinos Preferred or Disfavored by Cosmology?
Shahab Joudaki, Kevork N. Abazajian, Manoj Kaplinghat
We find that the viability of a cosmological model that incorporates 2 sterile neutrinos with masses around 1 eV each, as favored by global neutrino oscillation analyses including…
Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
Kevork N. Abazajian, Manoj Kaplinghat
We show the existence of a statistically significant, robust detection of a gamma-ray source in the Milky Way Galactic Center that is consistent with a spatially extended signal us…