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- Goddard Space Flight CenterUS398 papers
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27 papers · 1 filter
Measuring the Accreting Stellar and Intermediate Mass Black Hole Populations in the Galaxy and Local Group
Jonathan Grindlay, Didier Barret, Tomaso Belloni +23
The population of stellar black holes (SBHs) in the Galaxy and galaxies generally is poorly known in both number and distribution. SBHs are the fossil record of the massive stars i…
Experimental Basis for Special Relativity in the Photon Sector
Daniel Y. Gezari
A search of the literature reveals that none of the five new optical effects predicted by the special theory of relativity have ever been observed to occur in nature. In particular…
A Vigorous Explorer Program
Martin Elvis, Matthew Beasley, Roger Brissenden +47
Explorers have made breakthroughs in many fields of astrophysics. The science from both these missions contributed to three Nobel Prizes - Giacconi (2002), Mather, and Smoot (2006)…
The Sloan Lens ACS Survey. IX. Colors, Lensing and Stellar Masses of Early-type Galaxies
M. W. Auger, T. Treu, A. S. Bolton +5
We present the current photometric dataset for the Sloan Lens ACS (SLACS) Survey, including HST photometry from ACS, WFPC2, and NICMOS. These data have enabled the confirmation of…
Energy spectra of cosmic-ray nuclei at high energies
H. S. Ahn, P. Allison, M. G. Bagliesi +30
We present new measurements of the energy spectra of cosmic-ray (CR) nuclei from the second flight of the balloon-borne experiment Cosmic Ray Energetics And Mass (CREAM). The instr…
Cometary Origin of the Zodiacal Cloud and Carbonaceous Micrometeorites
David Nesvorny, Peter Jenniskens, Harold F. Levison +2
The zodiacal cloud is a thick circumsolar disk of small debris particles produced by asteroid collisions and comets. Here, we present a zodiacal cloud model based on the orbital pr…