Abstract We describe the Milky Way Survey (MWS) that will be undertaken with the Dark
Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak …

Satellite galaxies are predicted to generate gravitational density wakes as they orbit within
the dark matter (DM) halos of their hosts, causing their orbits to decay over time. The recent …

Indications of disequilibrium throughout the Milky Way (MW) highlight the need for compact,
flexible, non-parametric descriptions of phase–space distributions of galaxies. We present a …

Abstract The Sloan Extension for Galactic Understanding and Exploration 2 (SEGUE-2)
obtained 128,288 low-resolution spectra (R∼ 1800) of 118,958 unique stars in the first year …

We measure the enclosed Milky Way mass profile to Galactocentric distances of∼ 70 and∼
50 kpc using the smooth, diffuse stellar halo samples of Bird et al. The samples are Large …

Abstract In the Λ-Cold Dark Matter model of the universe, galaxies form in part through
accreting satellite systems. Previous works have built an understanding of the signatures of …

The mass of the Milky Way is a critical quantity that, despite decades of research, remains
uncertain within a factor of two. Until recently, most studies have used dynamical tracers in …

The vast majority of the mass in the Milky Way (MW) is in dark matter (DM); we therefore
cannot directly observe the MW mass distribution and have to use tracer populations in …

We investigate the stellar populations for a sample of 161 massive, mainly quiescent
galaxies at< z obs>= 0.8 with deep Keck/DEIMOS rest-frame optical spectroscopy (HALO7D …

We use halo dwarf stars with photometrically determined metallicities that are located within
2 kpc of the Sun to identify local halo substructure. The kinematic properties of these stars do …