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
28 papers · 1 filter
Cluster mass estimates from weak lensing
Matthias Bartelmann
The reliability of cluster lens reconstruction techniques based on weak lensing is studied in terms of the accuracy of their reproduction of the total cluster mass as a function of…
Galaxies, Human Eyes and Artificial Neural Networks
O. Lahav, A. Naim, R. J. Buta +8
Quantitative morphological classification of galaxies is important for understanding the origin of type frequency and correlations with environment. But galaxy morphological classi…
Determining the Motion of the Local Group Using SN Ia Light Curve Shapes
Adam G. Riess, William H. Press, Robert P. Kirshner
We have measured our Galaxy's motion relative to distant galaxies in which type Ia supernovae (SN Ia) have been observed. The effective recession velocity of this sample is 7000 km…
Halo/Thick Disk CVs and the Cosmic X-Ray Background
Jonathan E. Grindlay, Eyal Maoz
In a recent study (Maoz and Grindlay 1995) we have found that a number of previously recognized anomalies in the diffuse x-ray background at soft energies (\sim 0.5-2 keV) can be u…
Radiative association and inverse predissociation of oxygen atoms
J. F. Babb, A. Dalgarno
The formation of $\mbox{O}_2$ by radiative association and by inverse predissociation of ground state oxygen atoms is studied using quantum-mechanical methods. Cross sections, emis…
Advection-Dominated Accretion: Self-Similarity and Bipolar Outflows
Ramesh Narayan, Insu Yi
We consider axisymmetric viscous accretion flows where a fraction f of the viscously dissipated energy is advected with the accreting gas as stored entropy and a fraction 1-f is ra…
The lens parallax method: determining the redshifts of the faint blue galaxies through gravitational lensing
Ramesh Narayan, Matthias Bartelmann
We propose a new technique, which we call the lens parallax method, to determine simultaneously the redshift distribution of the faint blue galaxies and the mass distribution of fo…
Gravitational Lensing and the Mass Distribution of Clusters
Matthias Bartelmann, Ramesh Narayan
We review and discuss information on the mass distribution of galaxy clusters obtained from gravitational lensing.
Advection-Dominated Accretion: Underfed Black Holes and Neutron Stars
Ramesh Narayan, Insu Yi
We describe new optically thin solutions for rotating accretion flows around black holes and neutron stars. These solutions are advection dominated, so that most of the viscously d…
The Cambridge-Cambridge ROSAT Serendipity Survey - I. X-ray-luminous galaxies
B. J. Boyle, R. G. Mcmahon, B. J. Wilkes +1
We report on the first results obtained from a new optical identification programme of 123 faint X-ray sources with (0.5--2ergscm$^…
Non-thermal Acceleration from Reconnection Shocks
Eric G. Blackman, George B. Field
Reconnection shocks in a magnetically dominated plasma must be compressive. Non-thermal ion acceleration can occur across built-in slow shocks, and across outflow fast shocks when…
SN~1991T: Reflections of Past Glory
Brian P. Schmidt, Robert P. Kirshner, Bruno Leibundgut +5
We have obtained photometry and spectra of SN~1991T which extend more than 1000 days past maximum light, by far the longest a SN~Ia has been followed. Although SN~1991T exhibited n…
Existence and Stability of Spinning Embedded Vortices
Leandros Perivolaropoulos
I show the existence of a new type of vortex solution which is non-static but stationary and carries angular momentum. This {\it spinning vortex} can be embedded in models with tri…
Power Spectrum of Cosmic String Perturbations on the Microwave Background
Leandros Perivolaropoulos
I review recent progress towards a detailed understanding of the power spectrum of cosmic string perturbations induced on the Microwave Background (CMB). The use of a simple analyt…
A Class of Fast Methods for Processing Irregularly Sampled or Otherwise Inhomogeneous One-Dimensional Data
George B. Rybicki, William H. Press
With the ansatz that a data set's correlation matrix has a certain parametrized form (one general enough, however, to allow the arbitrary specification of a slowly-varying decorrel…
Beyond the Thin Lens Approximation
Ted Pyne, Mark Birkinshaw
We obtain analytic formulae for the null geodesics of Friedmann-Lema\^ıtre-Robertson-Walker spacetimes with scalar perturbations in the longitudinal gauge. We use these to provide…
A Quantitative Analysis of IRAS Maps of Molecular Clouds
Jennifer J. Wiseman, Fred C. Adams
We present an analysis of IRAS maps of five molecular clouds: Orion, Ophiuchus, Perseus, Taurus, and Lupus. For the classification and description of these astrophysical maps, we u…
Formal Results Regarding Metric-Space Techniques for the Study of Astrophysical Maps
Fred C. Adams, Jennifer J. Wiseman
We extend a newly developed formal system for the description of astrophysical maps. In this formalism, we consider the difference between maps to be the distance between elements…
An Accelerated Lambda Iteration Method for Multilevel Radiative Transfer III. Noncoherent Electron Scattering
G. B. Rybicki, D. G. Hummer
Since the mass of the electron is very small relative to atomic masses, Thomson scattering of low-energy photons () produces thermal Doppler frequency shifts that are…
The Settling of Warped Disks in Oblate Dark Halos
John Dubinski, Konrad Kuijken
When a galaxy forms, the disk may initially be tilted with respect to a flattened dark halo. The misalignment between the disk and the halo is a common explanation for galactic dis…
Advection-Dominated Accretion: A Self-Similar Solution
Ramesh Narayan, Insu Yi
We consider viscous rotating accretion flows in which most of the viscously dissipated energy is stored as entropy rather than being radiated. Such advection-dominated flows may oc…
Stable, Spinning Embedded Vortices
Leandros Perivolaropoulos
The spinning vortex is a stationary generalization of the Nielsen-Olesen vortex involving a linear time dependence of the Goldstone boson. Here we show that this vortex can be embe…
Consequences of Propagating Torsion in Connection-Dynamic Theories of Gravity
Sean M. Carroll, George B. Field
We discuss the possibility of constraining theories of gravity in which the connection is a fundamental variable by searching for observational consequences of the torsion degrees…
X-Ray and Optical Properties of Groups of Galaxies
I. P. Dell'Antonio, M. J. Geller, D. G. Fabricant
We examine the relationship between the group x-ray luminosity in the 0.3-3.5 keV band and the measured velocity dispersion, and galaxy surface number density. We find definite cor…