218 citations · 417 across the 5 of their papers we have counts for
6 papers · 1 filter
ALMA and VLA reveal the lukewarm chromospheres of the nearby red supergiants Antares and Betelgeuse
E. O'Gorman, G. M. Harper, K. Ohnaka +8
We first present spatially resolved ALMA and VLA continuum observations of the early-M red supergiant Antares to search for the presence of a chromosphere at radio wavelengths. We…
The close circumstellar environment of Betelgeuse - V. Rotation velocity and molecular envelope properties from ALMA
Pierre Kervella, Leen Decin, Anita M. S. Richards +6
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 mode…
The shock-heated atmosphere of an asymptotic giant branch star resolved by ALMA
Wouter Vlemmings, Theo Khouri, Eamon O'Gorman +8
Our current understanding of the chemistry and mass-loss processes in solar-like stars at the end of their evolution depends critically on the description of convection, pulsations…
An Updated 2017 Astrometric Solution for Betelgeuse
G. M. Harper, A. Brown, E. F. Guinan +4
We provide an update for the astrometric solution for the Type II supernova progenitor Betelgeuse using the revised Hipparcos Intermediate Astrometric Data (HIAD) of van Leeuwen, c…
Study of the inner dust envelope and stellar photosphere of the AGB star R Doradus using SPHERE/ZIMPOL
T. Khouri, M. Maercker, L. B. F. M. Waters +12
We use high-angular-resolution images obtained with SPHERE/ZIMPOL to study the photosphere, the warm molecular layer, and the inner wind of the close-by oxygen-rich AGB star R Dora…
Resolving the stellar activity of the Mira AB binary with ALMA
W. H. T. Vlemmings, S. Ramstedt, E. O'Gorman +4
We present the size, shape and flux densities at millimeter continuum wavelengths, based on ALMA science verification observations in Band 3 (~94.6 GHz) and Band 6 (~228.7 GHz), fr…