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 LaboratoryUS898 papers
- University of ChicagoUS889 papers
- University of WashingtonUS868 papers
- Yale UniversityUS848 papers
94 papers · 1 filter
Geometric Stability Analysis for Periodic Solutions of the Swift-Hohenberg Equation
J. -P. Eckmann, C. E. Wayne, P. Wittwer
In this paper we describe invariant geometrical ~structures in the phase space of the Swift-Hohenberg equation in a neighborhood of its periodic stationary states. We show that in…
Hubble Space Telescope Images of a Sample of Twenty Nearby Luminous Quasars
John N. Bahcall, Sofia Kirhakos, David H. Saxe +1
Observations with the Wide-Field Camera of the Hubble Space Telescope are presented for a representative sample of 20 intrinsically luminous quasars with redshifts smaller than 0.3…
General Relativity in terms of Dirac Eigenvalues
Giovanni Landi, Carlo Rovelli
The eigenvalues of the Dirac operator on a curved spacetime are diffeomorphism-invariant functions of the geometry. They form an infinite set of ``observables'' for general relativ…
Non-intercommuting Cosmic Strings
Luis M. A. Bettencourt, Pablo Laguna, Richard A. Matzner
We perform the numerical field evolution for the collision of two Abelian type I cosmic strings. We present evidence that, for collisions at small but characteristic relative veloc…
``Sum over Surfaces'' form of Loop Quantum Gravity
Michael P Reisenberger, Carlo Rovelli
We derive a spacetime formulation of quantum general relativity from (hamiltonian) loop quantum gravity. In particular, we study the quantum propagator that evolves the 3-geometry…
A Shock-Patching Code for Ultra-Relativistic Fluid Flows
L. Wen, A. Panaitescu, P. Laguna
We have developed a one-dimensional code to solve ultra-relativistic hydrodynamic problems, using the Glimm method for an accurate treatment of shocks and contact discontinuities.…
Telling Tails In The Presence Of A Cosmological Constant
Patrick R. Brady, Chris M. Chambers, William Krivan +1
We study the evolution of massless scalar waves propagating on spherically symmetric spacetimes with a non-zero cosmological constant. Considering test fields on both Schwarzschild…
Recoil Corrections of Order to the Hydrogen Energy Levels Revisited
Michael I. Eides, Howard Grotch
The recoil correction of order to the hydrogen energy levels is recalculated and a discrepancy existing in the literature on this correction for the 1S energy level,…
Gauge drag between half-filled Landau levels
Yong Baek Kim, A. J. Millis
The transresistance (i.e. the voltage induced in one layer by a current in another) between composite fermions in double-layers of half-filled Landau levels is shown to be dominate…
On diffeomorphism invariance for lattice theories
Alejandro Corichi, Jose A. Zapata
We consider the role of the diffeomorphism constraint in the quantization of lattice formulations of diffeomorphism invariant theories of connections. It has been argued that in wo…
Dirac structures and Poisson homogeneous spaces
Z. J. Liu, A. Weinstein, P. Xu
Poisson homogeneous spaces for Poisson groupoids are classfied in terms of Dirac structures for the corresponding Lie bialgebroids. Applications include Drinfel'd's classification…
Planetary Nebulae as standard candles XI. Application to Spiral Galaxies
John Feldmeier, Robin Ciardullo, George Jacoby
We report the results of an [O III] lambda 5007 survey for planetary nebulae (PN) in three spiral galaxies: M101 (NGC 5457), M51 (NGC 5194/5195) and M96 (NGC 3368). By comparing on…
Spatially Resolved Kinematics of Distant Galaxies
Matthew A. Bershady
A Tully-Fisher (TF) relation from H-alpha rotation curves of 19 luminous, star-forming galaxies reveals there is little evidence for evolution in the mass-to-light ratio (M/L) of t…
The Tully-Fisher Relation at Intermediate Redshifts
Matthew A. Bershady
Motivated by recent pioneering measurements of galaxy kinematics at intermediate redshifts, we have begun a pilot survey to measure rotation curves for blue, star-forming galaxies…
Factorization for hard exclusive electroproduction of mesons in QCD
John C. Collins, Leonid Frankfurt, Mark Strikman
We formulate and prove a QCD factorization theorem for hard exclusive electroproduction of mesons in QCD. The proof is valid for the leading power in Q and all logarithms. This gen…
Geometrical representation of Euclidean general relativity in the canonical formalism
Glenn Barnich, Viqar Husain
We give an SU(2) covariant representation of the constraints of Euclidean general relativity in the Ashtekar variables. The guiding principle is the use of triads to transform all…
Cauchy-characteristic Evolution of Einstein-Klein-Gordon Systems: The Black Hole Regime
Philippos Papadopoulos, Pablo Laguna
The Cauchy+characteristic matching (CCM) problem for the scalar wave equation is investigated in the background geometry of a Schwarzschild black hole. Previously reported work dev…
The postulates of gravitational thermodynamics
Erik A. Martinez
The general principles and logical structure of a thermodynamic formalism that incorporates strongly self-gravitating systems are presented. This framework generalizes and simplifi…
Optical Observations of GRO J1655-40 in Quiescence I: A Precise Mass for the Black Hole Primary
Jerome A. Orosz, Charles D. Bailyn
We report photometric and spectroscopic observations of the black hole binary GRO J1655-40 in complete quiescence. In contrast to the 1995 photometry, the light curves from 1996 ar…
An Analytical and Numerical Study of Optimal Channel Networks
F. Colaiori, A. Flammini, A. Maritan +1
We analyze the Optimal Channel Network model for river networks using both analytical and numerical approaches. This is a lattice model in which a functional describing the dissipa…
Large quantum gravity effects: Unexpected limitations of the classical theory
Abhay Ashtekar
3-dimensional gravity coupled to Maxwell (or Klein-Gordon) fields is exactly soluble under the assumption of axi-symmetry. The solution is used to probe several quantum gravity iss…
Interaction of small size wave packet with hadron target
L. Frankfurt, A. V. Radyushkin, M. Strikman
We calculate in QCD the cross section for the scattering of an energetic small-size wave packet off a hadron target. We use our results to study the small- behaviour of …
One More Analytic Result for Correction to the Lamb Shift
Michael I. Eides, Howard Grotch, Valery A. Shelyuto
The analytic result for the radiative correction of order to the Lamb shift connected with a polarization insertion in one of the two external Coulomb lines is obt…
Impact of Relativistic Fireballs on External Matter : Numerical Models of Cosmological Gamma-Ray Bursts
A. Panaitescu, L. Wen, P. Laguna +1
We numerically model the interaction between an expanding fireball and a stationary external medium whose density is either homogeneous or varies with distance as a power-law. The…