176 citations · 1.7k across the 50 of their papers we have counts for
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Constraints on the Surface Magnetic Fields and Age of a Cool Hypergiant: XMM-Newton X-ray Observations of VY CMa
R. Montez, J. H. Kastner, R. M. Humphreys +2
The complex circumstellar ejecta of highly evolved, cool hypergiants are indicative of multiple, asymmetric mass loss events. To explore whether such episodic, non-isotropic mass l…
Eta Carinae's 2014.6 Spectroscopic Event: The Extraordinary He II and N II Features
Kris Davidson, Andrea Mehner, Roberta Humphreys +2
Eta Carinae's spectroscopic events (periastron passages) in 2003, 2009, and 2014 differed progressively. He II 4687 and nearby N II multiplet 5 have special significance because th…
Luminous and Variable Stars in M31 and M33. II. Luminous Blue Variables, Candidate LBVs, Fe II Emission Line Stars, and Other Supergiants
Roberta M. Humphreys, Kerstin Weis, Kris Davidson +2
An increasing number of non-terminal eruptions are being found in the numerous surveys for optical transients. Very little is known about these giant eruptions, their progenitors a…
The Wind of Variable C in M33
Roberta M. Humphreys, Kris Davidson, Michael Gordon +4
We discuss the spectrum of Var C in M33 obtained just before the onset of its current brightening and recent spectra during its present "eruption" or optically thick wind stage. Th…