655 citations · 7.9k across the 89 of their papers we have counts for
6 papers · 2 filters
The Binary Fraction of Stars in Dwarf Galaxies: the Cases of Draco and Ursa Minor
Meghin Spencer, Mario Mateo, Edward Olszewski +3
Measuring the frequency of binary stars in dwarf spheroidal galaxies (dSphs) requires data taken over long time intervals. We combine radial velocity measurements from five literat…
The hidden giant: discovery of an enormous Galactic dwarf satellite in Gaia DR2
G. Torrealba, V. Belokurov, S. E. Koposov +8
We report the discovery of a Milky Way satellite in the constellation of Antlia. The Antlia 2 dwarf galaxy is located behind the Galactic disc at a latitude of a…
The case for a cold dark matter cusp in Draco
J. I. Read, M. G. Walker, P. Steger
We use a new mass modelling method, GravSphere, to measure the central dark matter density profile of the Draco dwarf spheroidal galaxy. Draco's star formation shut down long ago,…
Systematics in virial mass estimators for pressure-supported systems
Raphaël Errani, Jorge Peñarrubia, Matthew G. Walker
Mass estimators are a key tool to infer the dark matter content in pressure-supported systems like dwarf spheroidal galaxies (dSphs). We construct an estimator for enclosed masses…
Detection of a population of carbon-enhanced metal-poor stars in the Sculptor dwarf spheroidal galaxy
Anirudh Chiti, Joshua D. Simon, Anna Frebel +6
The study of the chemical abundances of metal-poor stars in dwarf galaxies provides a venue to constrain paradigms of chemical enrichment and galaxy formation. Here we present meta…
Snake in the Clouds: A new nearby dwarf galaxy in the Magellanic bridge
Sergey E. Koposov, Matthew G. Walker, Vasily Belokurov +9
We report the discovery of a nearby dwarf galaxy in the constellation of Hydrus, between the Large and the Small Magellanic Clouds. Hydrus 1 is a mildy elliptical ultra-faint syste…