Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Harvard UniversityUS3.4k papers
- California Institute of TechnologyUS2.8k papers
- Centre National de la Recherche ScientifiqueFR2.4k papers
- University of California, BerkeleyUS2k papers
- Massachusetts Institute of TechnologyUS2k papers
- University of ArizonaUS1.9k papers
- Goddard Space Flight CenterUS1.6k papers
- Space Telescope Science InstituteUS1.6k papers
- Princeton UniversityUS1.5k papers
- Max Planck Institute for AstronomyDE1.4k papers
- Max Planck Institute for Extraterrestrial PhysicsDE1.4k papers
- University of MichiganUS1.3k papers
20 papers · 1 filter
The Very-Soft X-Ray Emission of X-Ray Faint Early-Type Galaxies
S. Pellegrini, G. Fabbiano
A recent re-analysis of Einstein data, and new ROSAT observations, have revealed the presence of at least two components in the X-ray spectra of X-ray faint early-type galaxies: a…
Cinderella Strings
A. Achucarro, R. Gregory, J. A. Harvey +1
We investigate recent claims concerning a new class of cosmic string solutions in the Weinberg-Salam model. They have the general form of previously discussed semi-local and electr…
On the Asymptotics of Nielsen-Olesen Vortices
Leandros Perivolaropoulos
We investigate analytically and numerically the asymptotic behavior of the Nielsen-Olesen vortex solutions and show that they approach their asymptotic values exponentially but wit…
Lowered Evans Models: Analytic Distribution Functions of Oblate Halo Potentials
Konrad Kuijken, John Dubinski
We describe an analytic distribution function of a finite, oblate stellar system that is useful for the practical modelling of dark halos. The function is determined by lowering Ev…
A Cosmic String Specific Signature on the Cosmic Microwave Background
R. Moessner, L. Perivolaropoulos, R. Brandenberger
Using an analytical model for the string network we show that the kurtosis of cosmic microwave background (CMB) temperature gradient maps is a good statistic to distinguish between…
The Fourier Space Statistics of Seedlike Cosmological Perturbations
Leandros Perivolaropoulos
We propose a new test for distinguishing observationally cosmological models based on seed-like primordial perturbations (like cosmic strings or textures), from models based on Gau…
Existence of Double Vortex Solutions
Leandros Perivolaropoulos
We show analytically and numerically the existence of double vortex solutions in two-Higgs systems. These solutions are generalizations of the \no vortices and exist for all values…
A Possible Explanation for the Peculiar Correlations in the Angular Distribution of Gamma-Ray Bursts
Eyal Maoz
It has been recently discovered that the angular autocorrelation function of gamma-ray bursts exhibits sharp peaks at angular separations of (Quashnock and Lamb 1993)…
The Quantum Propagator for a Nonrelativistic Particle in the Vicinity of a Time Machine
Dalia S. Goldwirth, Malcolm J. Perry, Tsvi Piran +1
We study the propagator of a non-relativistic, non-interacting particle in any non-relativistic ``time-machine'' spacetime of the type shown in Fig.~1: an external, flat spacetime…
Clustering in the 1.2 Jy IRAS Galaxy Redshift Survey II: Redshift Distortions and ξ(r_p,π)
Karl B Fisher, Marc Davis, Michael A Strauss +2
We examine the effect of redshift space distortions on the galaxy two-point correlation function as a function of separations parallel () and perpendicular () to…
String-Dominated Cosmology
Dalia S. Goldwirth, Malcolm J. Perry
If string theory controls physics at the string scale, the dynamics of the early universe before the GUT era will be governed by the low-energy string equations of motion. Studying…
Do Gamma-Ray Burst Sources Repeat
Ramesh Narayan, Tsvi Piran
Following the discovery by Quashnock and Lamb (1993) of an apparent excess of -ray burst pairs with small angular separations, we reanalyze the angular distribution of the burst…
Could There Be Something Rather Than Nothing?
W. D. Garretson, E. D. Carlson
There is increasing evidence that the universe may have a small cosmological constant. We suggest a scheme for naturally generating a small cosmological constant. Our idea requires…
Clustering in the 1.2 Jy IRAS Galaxy Redshift Survey I: The Redshift and Real Space Correlation Functions
Karl B. Fisher, Marc Davis, Michael A. Strauss +2
We present analyses of the two-point correlation function derived from an all-sky redshift survey of 5313 galaxies extracted from the Infrared Astronomical Satellite (IRAS) databas…
Embedded Defects
Manuel Barriola, Tanmay Vachaspati, Martin Bucher
We give a prescription for embedding classical solutions and, in particular, topological defects in field theories which are invariant under symmetry groups that are not necessaril…
Numerical Analysis of Black Hole Evaporation
Tsvi Piran, Andrew Strominger
Black hole formation/evaporation in two-dimensional dilaton gravity can be described, in the limit where the number of matter fields becomes large, by a set of second-order par…
Indications for Gamma-Ray Bursts Originating within an Extended Galactic Halo ?
Eyal Maoz
If a substantial fraction of the observed gamma-ray bursts originates within an extended Galactic halo then their spatial distribution should deviate slightly from spherical symmet…
Null Geodesics in Perturbed Spacetimes
Ted Pyne, Mark Birkinshaw
We present a generalization and refinement of the Sachs-Wolfe technique which unifies many of the approaches taken to date and clarifies both the physical and the mathematical char…
Quantization of the Closed Mini-Superspace Models as Bound States
Jong Hyun Kung
Wheeler-DeWitt equation is applied to Friedmann Robertson Walker metric with various types of matter. It is shown that if the Universe ends in the matter dominated era (e.g…
Hydrodynamics of Relativistic Fireballs
Tsvi Piran, Amotz Shemi, Ramesh Narayan
We examine analytically and numerically the evolution of a relativistic fireball. We show that, after an early rearrangement phase, most of the matter and energy in the fireball is…