350 citations · 881 across the 24 of their papers we have counts for
15 papers · 1 filter
Submillimeter-wavelength Polarimetry of IRC+10216
B-G Andersson, Janik Karoly, Pierre Bastien +5
We present SCUBA-2/POL-2 850 m polarimetric observations of the circumstellar envelope (CSE) of the carbon-rich asymptotic giant branch (AGB) star IRC+10216. Both FIR and optica…
Red Supergiants, Yellow Hypergiants, and Post-RSG Evolution
Michael S. Gordon, Roberta M. Humphreys
How massive stars end their lives remains an open question in the field of star evolution. While the majority of stars above 9 M_sun will become red supergiants (RSGs), the termina…
Exploring the Mass Loss Histories of the Red Supergiants
Roberta M. Humphreys, Greta Helmel, Terry J. Jones +1
We report mid- to far-infrared imaging and photomety from 7 to 37 microns with SOFIA/FORCAST and 2 micron adaptive optics imaging with LBTI/LMIRCam of a large sample of red supergi…
The Unexpected Spectrum of the Innermost Ejecta of the Red Hypergiant VY CMa
Roberta M. Humphreys, L. M. Ziurys, J. J. Bernal +6
HST/STIS spectra of the small clumps and filaments closest to the central star in VY CMa reveal that the very strong K I emission and TiO and VO molecular emission, long thought to…
Luminous and Variable Stars in NGC 2403 and M81
Roberta M. Humphreys, Sarah Stangl, Michael S. Gordon +2
We present the results of spectroscopy and multi-wavelength photometry of luminous and variable star candidates in the nearby spiral galaxies NGC 2403 and M81. We discuss specific…
Thermal Emission in the Southwest Clump of VY CMa
Michael S. Gordon, Terry J. Jones, Roberta M. Humphreys +6
We present high spatial resolution LBTI/NOMIC images of VY CMa and its massive outflow feature, the Southwest (SW) Clump. Combined with high-resolution imaging from HST…