13 papers
Characterizing the disruption of Böotes III: a missing link in the Galactic halo?
Jaclyn Jensen, Daniel A. Boyea, Alan W. McConnachie +14
The authors investigate whether the Boötes III dwarf galaxy is the source of the Styx stellar stream by searching for tidal debris with Gaia data, new CaHK imaging, and matched‑fil…
Structural Diversity Among the Milky Way's Dwarf Spheroidal Satellites
Matthew G. Walker, Raphaël Errani, Andrew B. Pace +3
We fit a flexible double power-law (`') model to the stellar density fields observed for the Milky Way's known dwarf spheroidal satellite galaxies. We show that where stand…
Galactic tides and the outer density profile of the Sculptor and Ursa Minor dwarf spheroidals
Daniel A. Boyea, Julio F. Navarro, Jaclyn Jensen +1
Most dwarf spheroidal (dSph) satellites of the Milky Way follow exponential surface density profiles that decline sharply in the outer regions. The Sculptor (Scl) and Ursa Minor (U…
The abundance and radial distribution of faint and ultra-faint dwarfs in galaxy clusters
Pradyumna Sadhu, Laura V. Sales, Julio F. Navarro +3
Cosmological simulations of galaxy clusters are unable to resolve dwarf galaxies due to limited numerical resolution which drives the artificial disruption of dark matter substruct…
Collisional Dynamics of Stars and Dark Matter in Ultra-Faint Galaxies
Raphaël Errani, Raphaël Errani, Nicolas Esser +3
We use controlled N-body simulations to study the collisional exchange of energy between stars and dark matter in ultra-faint galaxies. We find that dynamical friction between star…
Tailored mass estimators for Milky Way dwarf Spheroidals
Sofia L. Splawska, Raphaël Errani, Jorge Peñarrubia +1
Assuming spherical symmetry and dynamical equilibrium within a given gravitational potential, a dwarf spheroidal (dSph) galaxy's globally averaged stellar velocity dispersion depen…