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- Goddard Space Flight CenterUS657 papers
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53 papers · 2 filters
Modeling the Galactic Center Nonthermal Filaments as Magnetized Wake
Russell B. Dahlburg, Giorgio Einaudi, T. N. LaRosa +1
We simulate the Galactic Center nonthermal filaments as magnetized wakes formed dynamically from amplification of a weak (tens of G) global magnetic field through the interactio…
High-Resolution Spectroscopy of G191-B2B in the Extreme Ultraviolet
R. G. Cruddace, M. P. Kowalski, D. J. Yentis +14
We report a high-resolution (R=3000-4000) spectroscopic observation of the DA white dwarf G191-B2B in the extreme ultraviolet band 220-245 A. A low- density ionised He component is…
The Soft Gamma-Ray Spectral Variability of Cygnus X-1
M. L. McConnell, A. A. Zdziarski, K. Bennett +11
We have used observations of Cygnus X-1 from the Compton Gamma-Ray Observatory (CGRO) and BeppoSAX to study the variation in the MeV gamma-ray emission between the hard and soft sp…
Spectra of the Expansion Stage of X-Ray Bursts
Nickolai Shaposhnikov, Lev Titarchuk
We present an analytical theory of thermonuclear X-ray burst atmosphere structure. Newtonian gravity and diffusion approximation are assumed. Hydrodynamic and thermodynamic profile…
An SDSS Survey For Resolved Milky Way Satellite Galaxies I: Detection Limits
Beth Willman, Julianne Dalcanton, Zeljko Ivezic +5
We present the detection limits of a new survey for resolved low surface brightness satellite galaxies to the Milky Way, based on the Sloan Digital Sky Survey (SDSS). Our survey ex…
The Sloan Digital Sky Survey Quasar Catalog I. Early Data Release
Donald P. Schneider, Gordon T. Richards, Xiaohui Fan +9
We present the first edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 3814 objects (3000 discovered by the SDSS) in the initial SDSS publi…