Stellar multiplicity is among the oldest and richest problems in astrophysics. Binary stars are
a cornerstone of stellar mass and radius measurements that underpin modern stellar …

The unprecedented quality of the astrometric measurements obtained with the ESA Gaia
spacecraft have initiated a revolution in Milky Way astronomy. Studies of star clusters in …

We construct from Gaia eDR3 an extensive catalogue of spatially resolved binary stars
within≈ 1 kpc of the Sun, with projected separations ranging from a few au to 1 pc. We …

We test Milgromian dynamics (MOND) using wide binary stars (WBs) with separations of 2–
30 kAU. Locally, the WB orbital velocity in MOND should exceed the Newtonian prediction …

BANYAN Σ is a new Bayesian algorithm to identify members of young stellar associations
within 150 pc of the Sun. It includes 27 young associations with ages in the range∼ 1–800 …

ABSTRACT The Galactic Archaeology with HERMES (GALAH) survey is a large-scale stellar
spectroscopic survey of the Milky Way, designed to deliver complementary chemical …

Aims. We produce a clean and well-characterised catalogue of objects within 100 pc of the
Sun from the Gaia Early Data Release 3. We characterise the catalogue through …

We construct from Gaia DR2 an extensive and very pure (contamination) catalogue of wide
binaries containing main-sequence (MS) and white dwarf (WD) components within 200 pc of …

Young stellar associations hold a star formation record that can persist for millions of years,
revealing the progression of star formation long after the dispersal of the natal cloud. To …

Eccentricity of wide binaries is difficult to measure due to their long orbital periods. With
Gaia's high-precision astrometric measurements, eccentricity of a wide binary can be …