Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of California, BerkeleyUS1.3k papers
- Goddard Space Flight CenterUS1.3k papers
- California Institute of TechnologyUS1.3k papers
- The Ohio State UniversityUS1.2k papers
- Centre National de la Recherche ScientifiqueFR1.1k papers
- Massachusetts Institute of TechnologyUS1.1k papers
- University of Maryland, College ParkUS1k papers
- Center for Astrophysics Harvard & SmithsonianUS975 papers
- Lawrence Berkeley National LaboratoryUS897 papers
- University of ChicagoUS889 papers
- University of WashingtonUS868 papers
- Yale UniversityUS848 papers
168 papers · 1 filter
Isolated Horizons: A Generalization of Black Hole Mechanics
Abhay Ashtekar, Christopher Beetle, Stephen Fairhurst
A set of boundary conditions defining a non-rotating isolated horizon are given in Einstein-Maxwell theory. A space-time representing a black hole which itself is in equilibrium bu…
Limits on dark matter WIMPs using upward-going muons in the MACRO detector
The MACRO Collaboration, M. Ambrosio et al
We perform an indirect search for Weakly Interacting Massive Particles (WIMPs) using the MACRO detector to look for neutrino-induced upward-going muons resulting from the annihilat…
ASCA Observations of GRO J1744-28
M. Nishiuchi, K. Koyama, Y. Maeda +7
We report the ASCA results of the bursting X-ray pulsar \gro, which was observed in February 1996 and March 1997. The source flux in the 2--10 keV band was erg/s…
Isophot Observations of Comet Hale-Bopp: Initial Data Reduction
E. Grün, S. B. Peschke, M. Stickel +17
Comet Hale-Bopp was observed five times with ISOPHOT, the photometer on board the Infrared Space Observatory (ISO). Each time broadband photometry was performed using 4 different d…
The Circumstellar Extinction of Planetary Nebulae
Robin Ciardullo, George H. Jacoby
We analyze the dependence of circumstellar extinction on core mass for the brightest planetary nebulae (PNe) in the Magellanic Clouds and M31. We show that in all three galaxies, a…
Chemical Abundances of Planetary Nebulae in the Bulge and Disk of M31
George H. Jacoby, Robin Ciardullo
We derive abundances and central star parameters for 15 planetary nebulae (PNe) in M31: 12 in the bulge and 3 in a disk field 14 kpc from the nucleus. No single abundance value cha…
Growth Rates in the Quaquaversal Tiling
Brimstone Draco, Lorenzo Sadun, Douglas Van Wieren
Conway and Radin's "quaquaversal" tiling of R^3 is known to exhibit statistical rotational symmetry in the infinite volume limit. A finite patch, however, cannot be perfectly isotr…
Diffractive Photoproduction of at HERA
L. L. Frankfurt, M. F. McDermott, M. Strikman
Predictions for the diffractive photoproduction of the -family at HERA energies, within the framework of the analysis by Frankfurt, Koepf and Strikman, are presented. Two novel…
The effective sigma-model of multidimensional gravity
M. Rainer
The properties of the effective sigma-model for D-dimensional Einstein gravity based on multidimensional geometries is analyzed. Besides pure geometry, additional minimally coupled…
Three contributions to Galaxy Dynamics: distant galaxy kinematics, mass, and M/L
M. A. Bershady, A. Jangren, D. R. Andersen +3
1) Rotation Curves and M/L Evolution for Galaxies to z=0.4, (Bershady, Haynes, Giovanelli, & Andersen) 2) Mass Estimates of Starbursting Galaxies: Line Widths versus Near-IR Lumino…
Distortion of Globular Clusters by Galactic Bulges
Holly K. Nordquist, Robert J. Klinger, Pablo Laguna +1
One of the external fields that influences the population of globular clusters is that due to galactic bulges. In extreme situations, perigalactic distances pc, globu…
Quantum groupoids associated to universal dynamical R-matrices
Ping Xu
By using twist construction, we obtain a quantum groupoid $\cald\ot_{q}\uqg$ for any simple Lie algebra $\frakg$. The underlying Hopf algebroid structure encodes all the informatio…
Afterglows from Gamma-ray Bursts
P. Meszaros
The successful discovery of X-ray, optical and radio afterglows of gamma-ray bursts has significantly helped our understanding of these sources, and made possible the identificatio…
Optical and UV observations of a strong flare in the young, single K2-dwarf LQ Hya
D. Montes, S. H. Saar, A. Collier Cameron +1
We present high resolution optical echelle spectra and IUE observations during a strong flare on 1993 December 22 in the very active, young, rapidly rotating, single K2 dwarf LQ Hy…
The Post-Common Envelope and Pre-Cataclysmic Binary PG 1224+309
Jerome A. Orosz, Richard A. Wade, Jason J. B. Harlow +3
We have made extensive spectroscopic and photometric observations of PG 1224+309, a close binary containing a DA white dwarf primary and an M4+ secondary. The H alpha line is in em…
One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays
G. Matt, M. Guainazzi, R. Maiolino +11
The Circinus Galaxy has been observed, for the first time above 10 keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1--10 keV spectrum is apparent in…
X-ray Pulsations from the Central Source in Puppis A
G. G. Pavlov, V. E Zavlin, J. Truemper
There are several supernova remnants which contain unresolved X-ray sources close to their centers, presumably radio-quiet neutron stars. To prove that these objects are indeed neu…
Protein structures and optimal folding emerging from a geometrical variational principle
Cristian Micheletti, Jayanth R. Banavar, Amos Maritan +1
Novel numerical techniques, validated by an analysis of barnase and chymotrypsin inhibitor, are used to elucidate the paramount role played by the geometry of the protein backbone…
Cosmic Rays and Neutrinos from Gamma Ray Bursts
Jorg P. Rachen, P. Meszaros
We review the hypothesis that the acceleration of protons at internal shocks in Gamma Ray Bursts (GRB) could be the origin of the ultra-high energy cosmic rays (UHECR) observed at…
Novel supermultiplets of SU(2,2|4) and the AdS_5/CFT_4 duality
M. Gunaydin, D. Minic, M. Zagermann
We continue our study of the unitary supermultiplets of the N=8, d=5 anti-de Sitter (AdS_5) superalgebra SU(2,2|4), which is also the N=4 extended conformal superalgebra in d=4. We…
ASCA Observations of Radio-Loud AGNs
Rita Sambruna, Michael Eracleous, Richard Mushotzky
We summarize the results of an X-ray spectroscopic survey of radio-loud AGNs observed with ASCA, using proprietary and archival data (public up to 1998 September). We briefly compa…
Geometric Quantization of Real Minimal Nilpotent Orbits
Ranee Brylinski
In this paper, we begin a quantization program for nilpotent orbits of a real semisimple Lie group. These orbits and their covers generalize the symplectic vector space. A complex…
Antiproton Production and Antudeuteron Production Limits in Relativistic Heavy Ion Collisions
T. A. Armstrong
We present results from Experiment 864 for antiproton production and antideuteron limits in Au + Pb collisions at 11.5 GeV/c per nucleon. We have measured invariant multiplicities…
The internal description of a causal set: What the universe looks like from the inside
Fotini Markopoulou
We describe an algebraic way to code the causal information of a discrete spacetime. The causal set C is transformed to a description in terms of the causal pasts of the events in…