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
142 papers · 1 filter
The Energy Spectra and Relative Abundances of Electrons and Positrons in the Galactic Cosmic Radiation
S. W. Barwick, J. J. Beatty, C. R. Bower +17
Observations of cosmic-ray electrons and positrons have been made with a new balloon-borne detector, HEAT (the "High-Energy Antimatter Telescope"), first flown in 1994 May from For…
Steric constraints in model proteins
Cristian Micheletti, Jayanth R. Banavar, Amos Maritan +1
A simple lattice model for proteins that allows for distinct sizes of the amino acids is presented. The model is found to lead to a significant number of conformations that are the…
Integration of Lie bialgebroids
Kirill C. H. Mackenzie, Ping Xu
We prove that under certain mild assumptions a Lie bialgebroid integrates to a Poisson groupoid. This includes, in particular, a new proof of the existence of local symplectic grou…
Measurement of Relativistic Orbital Decay in the PSR B1534+12 Binary System
I. H. Stairs, Z. Arzoumanian, F. Camilo +5
We have made timing observations of binary pulsar PSR B1534+12 with radio telescopes at Arecibo, Green Bank, and Jodrell Bank. By combining our new observations with data collected…
Infinite Statistics and Black Holes in Matrix Theory
D. Minic
The concept of infinite statistics is applied to the analysis of black hole thermodynamics in Matrix Theory. It is argued that Matrix Theory partons, D0-branes, satisfy quantum inf…
A Search for Line Shape and Depth Variations in 51 Pegasi and Tau Bootis
T. M. Brown, R. Kotak, S. D. Horner +4
Spectroscopic observations of 51 Pegasi and tau Bootis show no periodic changes in the shapes of their line profiles; these results for 51 Peg are in significant conflict with thos…
Refreshed Shocks and Afterglow Longevity in GRB
M. J. Rees, P. Meszaros
We consider fireball models where the ejecta have a range of bulk Lorentz factors, so that the inner (lower ) parts may carry most of the mass, or even most of the energy. The o…
1H0419-577: a two-state Seyfert Galaxy?
M. Guainazzi, A. Comastri, G. Stirpe +3
The preliminary results of the BeppoSAX observation of the radio-quiet AGN 1H0419-577 are presented. Despite its broad line optical spectrum, the intermediate X-ray spectrum (i.e.…
The Kinematic Composition of MgII Absorbers
Jane C. Charlton, Christopher W. Churchill
The study of galaxy evolution using quasar absorption lines requires an understanding of what components of galaxies and their surroundings are contributing to the absorption in va…
Quantum geometry with intrinsic local causality
Fotini Markopoulou, Lee Smolin
The space of states and operators for a large class of background independent theories of quantum spacetime dynamics is defined. The SU(2) spin networks of quantum general relativi…
Cross Section Fluctuations of Photon Projectile in Generalized Vector Meson Dominance Model
L. Frankfurt, V. Guzey, M. Strikman
We explain that the generalized vector meson dominance (GVMD) model is successful in describing hard high energy processes because it contains expected in QCD Color Coherent Phenom…
Toric varieties and minimal complexes
Paul Bressler, Valery Lunts
We translate the equivariant decomposition theorem (in the case of a proper morphism of toric varieties) in to the language of combinatorially defined ``shifted minimal complexes''…
Symmetry reduced Einstein gravity and generalized sigma and chiral models
Abhay Ashtekar, Viqar Husain
Certain features associated with the symmetry reduction of the vacuum Einstein equations by two commuting, space-like Killing vector fields are studied. In particular, the discussi…
Orbital Parameters for the Soft X-ray Transient 4U 1543-47: Evidence for a Black Hole
Jerome A. Orosz, Raj K. Jain, Charles D. Bailyn +2
(shortened) Spectroscopic observations of the soft X-ray transient 4U 1543-47 reveal a radial velocity curve with a period of P=1.123 +/- 0.008 days and a semi-amplitude of K_2 = 1…
Theoretical Models of Gamma-Ray Bursts
P. Meszaros
Models of gamma ray bursts are reviewed in the light of recent observations of afterglows which point towards a cosmological origin. The physics of fireball shock models is discuss…
Boosted three-dimensional black-hole evolutions with singularity excision
The Binary Black Hole Grand Challenge Alliance, :, G. B. Cook +43
Binary black hole interactions provide potentially the strongest source of gravitational radiation for detectors currently under development. We present some results from the Binar…
Evidence for Parton kT Effects in High pT Particle Production
Fermilab E706 Collaboration, L. Apanasevich
Inclusive pizero and direct-photon cross sections in the kinematic range 3.5 < pT < 12 GeV/c with central rapidities are presented for 530 and 800 GeV/c proton beams and a 515 GeV/…
Radio-loud Active Galaxies in the Northern ROSAT All-Sky Survey III: New Spectroscopic Identifications from the RGB BL Lac Survey
S. A. Laurent-Muehleisen, R. I. Kollgaard, R. B. Ciardullo +3
We present new spectroscopic identifications for 169 objects in the RASS-Green Bank (RGB) catalog of radio- and X-ray-emitting AGN. These data significantly increase the fraction o…
Protein design in a lattice model of hydrophobic and polar amino acids
C. Micheletti, F. Seno, A. Maritan +1
A general strategy is described for finding which amino acid sequences have native states in a desired conformation (inverse design). The approach is used to design sequences of 48…
Critical Dynamics of Symmetry Breaking: Quenches, Dissipation and Cosmology
Pablo Laguna, Wojciech H. Zurek
Symmetry-breaking phase transitions may leave behind topological defects \cite{Kibble} with a density dependent on the quench rate \cite{Zurek}. We investigate the dynamics of such…
Multiwavelength Observations of a Dramatic High Energy Flare in the Blazar 3C 279
A. E. Wehrle, E. Pian, C. M. Urry +3
The blazar 3C 279, one of the brightest identified extragalactic objects in the gamma-ray sky, underwent a flare of a factor 10 amplitude in gamma-rays towards the end of a 3-week…
A spin network generalization of the Jones Polynomial and Vassiliev invariants
R. Gambini, J. Griego, J. Pullin
We apply the ideas of Alvarez and Labastida to the invariant of spin networks defined by Witten and Martin based on Chern-Simons theory. We show that it is possible to define ambie…
Intracluster Stars and the Galactic Halos of Virgo
John J. Feldmeier, Robin Ciardullo, Roger Bartlett +1
Planetary nebulae can be useful dynamical probes of elliptical galaxy halos, but progress thus far has been hampered by the small data samples available for study. In order to obta…
Kinematics and Cloud to Cloud Abundance Ratios: A Rosetta Stone for Disk and Halo Components in Mg II Absorbers
Christopher W. Churchill, Jane C. Charlton
Based upon QSO absorption line studies, galaxies at 0.3 < z < 1.0 are seen to have extended gaseous "halos". When the absorption lines are observed at high resolution, the velocity…