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- University of California, San FranciscoUS31 papers
- University of HoustonUS29 papers
- University of California, BerkeleyUS20 papers
- Space Telescope Science InstituteUS19 papers
- Lawrence Berkeley National LaboratoryUS18 papers
- Stanford UniversityUS17 papers
- Centre National de la Recherche ScientifiqueFR15 papers
- University of ArizonaUS14 papers
- The University of TokyoJP13 papers
- Jet Propulsion LaboratoryUS12 papers
- California Institute of TechnologyUS11 papers
- Princeton UniversityUS11 papers
5 papers · 1 filter
Equivalence of the Path Integral for Fermions in Cartesian and Spherical Coordinates
Andrew Briggs, Horacio E. Camblong, Carlos R. Ordonez
The path-integral calculation for the free energy of a spin-1/2 Dirac-fermion gas is performed in spherical polar coordinates for a flat spacetime geometry. Its equivalence with th…
Impacts of Dark Stars on Reionization and Signatures in the Cosmic Microwave Background
Pat Scott, Aparna Venkatesan, Elinore Roebber +3
We perform a detailed and systematic investigation of the possible impacts of dark stars upon the reionization history of the Universe, and its signatures in the cosmic microwave b…
X-rays and hard UV radiation From the First Galaxies: Ionization Bubbles and 21 cm Observations
Aparna Venkatesan, Andrew J. Benson
The first stars and quasars are known sources of hard ionizing radiation in the first billion years of the Universe. We examine the joint effects of X-rays and hard UV radiation fr…
Engaging Stakeholders through Twitter: How Nonprofit Organizations are Getting More Out of 140 Characters or Less
Kristen Lovejoy, Richard Waters, Gregory D. Saxton
140 characters seems like too small a space for any meaningful information to be exchanged, but Twitter users have found creative ways to get the most out of each Tweet by using di…
Creation of cosmic structure in the complex galaxy cluster merger Abell 2744
J. Merten, D. Coe, R. Dupke +15
We present a detailed strong lensing, weak lensing and X-ray analysis of Abell 2744 (z = 0.308), one of the most actively merging galaxy clusters known. It appears to have unleashe…