655 citations · 7.9k across the 89 of their papers we have counts for
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Binary stars as probes of dark substructures in dwarf galaxies
Jorge Penarrubia, Sergey E. Koposov, Matthew G. Walker +3
We use analytical and N-body methods to examine the survival of wide stellar binaries against repeated encounters with dark substructures orbiting in the dark matter haloes of dwar…
Comparing the Dark Matter Halos of Spiral, Low Surface Brightness and Dwarf Spheroidal Galaxies
Matthew G. Walker, Stacy S. McGaugh, Mario Mateo +2
We consider dark masses measured from kinematic tracers at discrete radii in galaxies for which baryonic contributions to overall potentials are either subtracted or negligible. Re…
Big fish, small fish: Two New Ultra-Faint Satellites of the Milky Way
V. Belokurov, M. G. Walker, N. W. Evans +8
We report the discovery of two new Milky Way satellites in the neighboring constellations of Pisces and Pegasus identified in data from the Sloan Digital Sky Survey. Pisces II, an…
The impact of dark matter cusps and cores on the satellite galaxy population around spiral galaxies
Jorge Penarrubia, Andrew J. Benson, Matthew G. Walker +3
(Abridged) We use N-body simulations to study the effects that a divergent (i.e. "cuspy") dark matter (DM) profile introduces on the tidal evolution of dwarf spheroidal galaxies (d…
Are stellar over-densities in dwarf galaxies the "smoking gun" of triaxial dark matter haloes?
Jorge Penarrubia, Matthew G. Walker, Gerard Gilmore
We use N-body simulations to study the tidal evolution of globular clusters (GCs) in dwarf spheroidal (dSph) galaxies. Our models adopt a cosmologically motivated scenario in which…
Searching for dark matter in X-rays: how to check the dark matter origin of a spectral feature
Alexey Boyarsky, Oleg Ruchayskiy, Dmytro Iakubovskyi +3
A signal from decaying dark matter (DM) can be unambiguously distinguished from spectral features of astrophysical or instrumental origin by studying its spatial distribution. We d…