218 citations · 840 across the 16 of their papers we have counts for
16 papers
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…
A search for radio emission from exoplanets around evolved stars
Eamon O'Gorman, Colm P. Coughlan, Wouter Vlemmings +4
The majority of searches for radio emission from exoplanets have to date focused on short period planets, i.e., the so-called hot Jupiter type planets. However, these planets are l…
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…
Detection of thermal radio emission from a single coronal giant
Eamon O'Gorman, Graham M. Harper, Wouter Vlemmings
We report the detection of thermal continuum radio emission from the K0 III coronal giant Pollux ( Gem) with the Karl G. Jansky Very Large Array (VLA). The star was detected at…