We present the JWST Resolved Stellar Populations Early Release Science (ERS) program.
We obtained 27.5 hr of NIRCam and NIRISS imaging of three targets in the Local Group …

Abstract We present Dark Energy Spectroscopic Instrument (DESI) observations of the inner
halo of M31, which reveal the kinematics of a recent merger—a galactic immigration event …

Observational studies are finding stars believed to be relics of the earliest stages of
hierarchical mass assembly of the Milky Way (ie proto-galaxy). In this work, we contextualize …

We use magnetohydrodynamical simulations of Milky Way-mass haloes from the Auriga
project to investigate the properties of surviving and destroyed dwarf galaxies that are …

We present detailed chemical abundance measurements for 45 globular clusters (GCs)
associated with galaxies in (and, in one case, beyond) the Local Group. The measurements …

The chemical abundances of a galaxy's metal-poor stellar population can be used to
investigate the earliest stages of its formation and chemical evolution. The Magellanic …

In the era of large-scale spectroscopic surveys in the Local Group, we can explore using
chemical abundances of halo stars to study the star formation and chemical enrichment …

Context. The Andromeda (M 31) galaxy displays several substructures in its inner halo.
Different simulations associate their origin with either a single relatively massive merger, or …

We study stellar-halo formation using six Milky-Way-mass galaxies in FIRE-2 cosmological
zoom simulations. We find that of the outer (50–300 kpc) stellar halo in each system consists …

We obtain a magnitude-limited sample of Andromeda (M 31) disc PNe with chemical
abundance estimated through the direct detection of the [O iii] 4363 Å line. This leads to 205 …