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10 papers · 2 filters
The variable ionized absorber in the Seyfert 2 Mrk 348
E. Marchese, V. Braito, J. N Reeves +6
We present the results of the analysis of the X-ray spectrum of the Seyfert 2 Mrk 348, observed by Suzaku and XMM-Newton. The overall spectrum of Mrk 348 can be described by a prim…
The Dynamics of Ultracompact HII Regions
Nathaniel Roth, Steven W. Stahler, Eric Keto
Many ultracompact HII regions exhibit a cometary morphology in radio continuum emission. In such regions, a young massive star is probably ablating, through its ultraviolet radiati…
A Multi-wavelength Study of the Host Environment of SMBHB 4C+37.11
Roger W. Romani, W. R. Forman, Christine Jones +4
4C+37.11, at z=0.055 shows two compact radio nuclei, imaged by VLBI at 7mas separation, making it the closest known resolved super-massive black hole binary (SMBHB). An important q…
Found: The Progenitors of AM CVn and Supernovae .Ia
Mukremin Kilic, J. J. Hermes, A. Gianninas +7
We present optical and X-ray observations of two tidally distorted, extremely low-mass white dwarfs (WDs) with massive companions. There is no evidence of neutron stars in our Chan…
Abundant cyanopolyynes as a probe of infall in the Serpens South cluster-forming region
R. K. Friesen, L. Medeiros, S. Schnee +4
We have detected bright HC7N J = 21-20 emission toward multiple locations in the Serpens South cluster-forming region using the K-Band Focal Plane Array at the Robert C. Byrd Green…
Galactic Stellar Populations in the Era of SDSS and Other Large Surveys
Zeljko Ivezic, Timothy C. Beers, Mario Juric
Studies of stellar populations, understood to mean collections of stars with common spatial, kinematic, chemical, and/or age distributions, have been reinvigorated during the last…