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9 papers · 2 filters
Characterizing Quasars in the Mid-infrared: High Signal-to-Noise Spectral Templates
Allison R. Hill, S. C. Gallagher, R. P. Deo +2
Mid-infrared (MIR) quasar spectra exhibit a suite of emission features including high ionization coronal lines from the narrow line region illuminated by the ionizing continuum, br…
Unveiling the Massive Stars in the Galactic Center
Hui Dong, Jon Mauerhan, Mark R. Morris +2
We present our recent efforts to unveil and understand the origin of massive stars outside the three massive star clusters in the Galactic Center. From our HST/NICMOS survey of the…
CO rotational line emission from a dense knot in Cas A Evidence for active post-reverse-shock chemistry
Sofia H. J. Wallström, Chiara Biscaro, Francisco Salgado +6
We report a Herschel detection of high-J rotational CO lines from a dense knot in the supernova remnant Cas A. Based on a combined analysis of these rotational lines, and previousl…
Infrared Spectroscopic Survey of the Quiescent Medium of Nearby Clouds: I. Ice Formation and Grain Growth in Lupus
A. C. A. Boogert, J. E. Chiar, C. Knez +5
Infrared photometry and spectroscopy (1-25 um) of background stars reddened by the Lupus molecular cloud complex are used to determine the properties of the grains and the composit…
Aligned grains and inferred toroidal magnetic fields in the envelopes of massive young stellar objects
Janet P. Simpson, Barbara A. Whitney, Dean C. Hines +6
Massive young stellar objects (YSOs), like low-mass YSOs, are thought to be surrounded by optically thick envelopes and/or discs and are observed to have associated regions that pr…
The Mopra Southern Galactic Plane CO Survey
Michael Burton, Catherine Braiding, Christian Glueck +15
We present the first results from a new carbon monoxide (CO) survey of the southern Galactic plane being conducted with the Mopra radio telescope in Australia. The 12CO, 13CO and C…