Low-mass stars in their core-helium-burning stage define the sharpest feature present in the
color-magnitude diagrams of nearby galaxy systems: the red clump (RC). This feature has …

Galaxy groups are more than an intermediate scale between clusters and halos hosting
individual galaxies, they are crucial laboratories capable of testing a range of astrophysics …

Tidal disruption events (TDEs) are bursts of electromagnetic energy that are released when
supermassive black holes at the centres of galaxies violently disrupt a star that passes too …

Context. The Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to
obtain astrophysical parameters and elemental abundances for 100 000 stars, including …

We introduce the first two simulations of the IllustrisTNG project, a next generation of
cosmological magnetohydrodynamical simulations, focusing on the optical colours of …

We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data
Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog …

Cosmic neutrinos provide a unique window into the otherwise hidden mechanism of particle
acceleration in astrophysical objects. The IceCube Collaboration recently reported the likely …

Increasingly, uncertainties in predictions from galaxy formation simulations (at sub-Milky
Way masses) are dominated by uncertainties in stellar evolution inputs. In this paper, we …

Hard X-ray (≥ 10 keV) observations of active galactic nuclei (AGNs) can shed light on some
of the most obscured episodes of accretion onto supermassive black holes. The 70-month …

ABSTRACT The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has
built the largest moderately high-resolution (R≈ 22,500) spectroscopic map of the stars …