The formation of planetary cores must proceed rapidly in order for the giant planets to
accrete their gaseous envelopes before the dissipation of the protoplanetary gas disc (≲ 3 …

We present an analysis of the ages and star formation history of the F-type stars in the Upper
Scorpius (US), Upper Centaurus–Lupus (UCL), and Lower Centaurus–Crux (LCC) …

Aims. We use Gaia Data Release 2 (DR2) to place 252 Herbig Ae/Be stars in the
Hertzsprung–Russell diagram and investigate their characteristics and properties. Methods …

Abstract Herbig Ae/Be stars (HAeBes) span a key mass range that links low-and high-mass
stars, and thus provide an ideal window from which to explore their formation. This paper …

This is the first in a series of papers in which we describe and report the analysis of a large
survey of Herbig Ae/Be stars in circular spectropolarimetry. Using the ESPaDOnS and …

Abstract We report new Spitzer Space Telescope observations, using the IRAC and MIPS
instruments, of the young (~ 3 Myr) σ Orionis cluster. We identify 336 stars as members of the …

Understanding how young stars gain their masses through disk-to-star accretion is of
paramount importance in astrophysics. It affects our knowledge about the early stellar …

This work presents a spectroscopic study of 163 Herbig Ae/Be stars. Amongst these, we
present new data for 30 objects. Stellar parameters such as temperature, reddening, mass …

Traditionally, runaway stars are O-and B-type stars with large peculiar velocities. We would
like to extend this definition to young stars (up to≈ 50 Myr) of any spectral type and to …

The Orion Nebula is one of the most frequently observed nearby (< 1 kiloparsec) star
forming regions and, consequently, the subject of a large bibliography of observations and …