7 papers
EDGE: Two routes to dark matter core formation in ultra-faint dwarfs
Matthew D. A. Orkney, Justin I. Read, Martin P. Rey +6
In the standard Lambda cold dark matter paradigm, pure dark matter simulations predict dwarf galaxies should inhabit dark matter haloes with a centrally diverging density `cusp'. T…
New Constraints on the Mass of Fermionic Dark Matter from Dwarf Spheroidal Galaxies
James Alvey, Nashwan Sabti, Victoria Tiki +7
Dwarf spheroidal galaxies are excellent systems to probe the nature of fermionic dark matter due to their high observed dark matter phase-space density. In this work, we review, re…
EDGE: A new approach to suppressing numerical diffusion in adaptive mesh simulations of galaxy formation
Andrew Pontzen, Martin P. Rey, Corentin Cadiou +4
We introduce a new method to mitigate numerical diffusion in adaptive mesh refinement (AMR) simulations of cosmological galaxy formation, and study its impact on a simulated dwarf…
EDGE: From quiescent to gas-rich to star-forming low-mass dwarf galaxies
Martin P. Rey, Andrew Pontzen, Oscar Agertz +3
We study how star formation is regulated in low-mass field dwarf galaxies (), using cosmological high-resolution ($3 \, \text{pc}…
EDGE: The origin of scatter in ultra-faint dwarf stellar masses and surface brightnesses
Martin P. Rey, Andrew Pontzen, Oscar Agertz +4
We demonstrate how the least luminous galaxies in the Universe, ultra-faint dwarf galaxies, are sensitive to their dynamical mass at the time of cosmic reionization. We select a lo…
Globular clusters as probes of dark matter cusp-core transformations
M. D. A. Orkney, J. I. Read, James A. Petts +1
Bursty star formation in dwarf galaxies can slowly transform a steep dark matter cusp into a constant density core. We explore the possibility that globular clusters (GCs) retain a…