We present a high-resolution (∼ 0 farcs 12,∼ 16 au, mean sensitivity of 50 μJy beam− 1 at
225 GHz) snapshot survey of 32 protoplanetary disks around young stars with spectral type …

Stellar evolution theory is most uncertain for massive stars. For reliable predictions of the
evolution of massive stars and their final fate, solid constraints on the physical parameters …

ABSTRACT B [e] supergiants are luminous evolved massive stars. The mass-loss during this
phase creates a complex circumstellar environment with atomic, molecular, and dusty …

Massive stars expel large amounts of mass during their late evolutionary phases. We aim to
unveil the physical conditions within the warm molecular environments of B [e] supergiants …

The Galactic B [e] supergiant MWC 137 is surrounded by a large-scale optical nebula. To
shed light on the physical conditions and kinematics of the nebula, we analyze the optical …

B [e] stars are massive B type emission line stars in different evolutionary stages ranging
from pre-main sequence to post-main sequence. Due to their mass loss and ejection events …

Context. B [e] supergiants are massive post-main-sequence stars, surrounded by a complex
circumstellar environment where molecules and dust can survive. The shape in which the …

Yellow hypergiants are evolved massive stars that were suggested to be in post-red
supergiant stage. Post-red supergiants that evolve back to the blue, hot side of the …

The Galactic emission-line object MWC 349A is one of the brightest radio stars in the sky.
The central object is embedded in an almost edge-on oriented Keplerian rotating thick disc …

The first high-resolution spectra (resolving powers of R≥ 60 000) of the emission-line star
VES 723, which has an unknown evolutionary status, were taken at the 6-m Big Telescope …