In the past decade, a consensus has emerged regarding the nature of classical Be stars:
They are very rapidly rotating main sequence B stars, which, through a still unknown, but …

ABSTRACT The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a
high-resolution infrared spectroscopic survey spanning all Galactic environments (ie, bulge …

Context. HR 6819 was recently proposed to be a triple system consisting of an inner B-type
giant plus black hole (BH) binary with an orbital period of 40 d and an outer Be tertiary. This …

Rapid rotation is a fundamental characteristic of classical Be stars and a crucial property
allowing for the formation of their circumstellar disks. Past evolution in a mass and angular …

Context. About 2/3 of the Be stars present the so-called variations, a phenomenon
characterized by the quasi-cyclic variation in the ratio between the violet and red emission …

Be stars possess gaseous circumstellar disks that modify in many ways the spectrum of the
central B star. Furthermore, they exhibit variability at several timescales and for a large …

Be stars have generally been characterized by the emission lines in their spectra, and
especially the time variability of those spectroscopic features. They are known to also exhibit …

We use the three-dimensional Monte Carlo radiative transfer code hdust to model Be stars
where the disc is tilted from the equatorial plane of the star. We compute 128 models across …

Circumstellar discs of Be stars are thought to be formed from material ejected from a fast-
spinning central star. This material possesses large amounts of angular momentum and …

Be stars possess gaseous circumstellar decretion disks, which are well described using
standard α-disk theory. The Be star 28 CMa recently underwent a long outburst followed by …