We observed Betelgeuse using ALMA's extended configuration in band 7 (f≈ 340 GHz, λ≈
0.88 mm), resulting in a very high angular resolution of 18 mas. Using a solid body rotation …

The transport of energy through convection is important during many stages of stellar
evolution,, and is best studied in our Sun or giant evolved stars. Features that are attributed …

Context. Mass-loss occurring in red supergiants (RSGs) is a major contributor to the
enrichment of the interstellar medium in dust and molecules. The physical mechanism of this …

ABSTRACT The Keck Interferometer Nuller (KIN), the first operational separated-aperture
infrared nulling interferometer, was designed to null the mid-infrared emission from nearby …

Context. The mass-loss mechanism of cool massive evolved stars is poorly understood. The
proximity of Betelgeuse makes it an appealing target to study its atmosphere, map the shape …

Context. Theory surrounding the origin of the dust-laden winds from evolved stars remains
mired in controversy. Characterizing the formation loci and the dust distribution within …

Betelgeuse is one of the brightest red supergiant (RSG) stars because of its proximity to the
Solar system. This makes it important when deducing the features and evolutionary phases …

Context. GCIRS 7, the brightest star in the Galactic central parsec, formed 6±2 Myr ago
together with dozens of massive stars in a disk orbiting the central black-hole. It has been …

Optical interferometry is entering a new age with several ground-based long-baseline
observatories now making observations of unprecedented spatial resolution. Based on a …

Dual epoch spectroscopy of the lenticular galaxy, NGC 4203, obtained with the Hubble
Space Telescope has revealed that the double-peaked component of the broad Hα …