Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR3.8k papers
- University of ChicagoUS2.9k papers
- University of ArizonaUS2.6k papers
- Lawrence Berkeley National LaboratoryUS2.5k papers
- Institute for High Energy PhysicsES2.5k papers
- University of CambridgeGB2.4k papers
- The Ohio State UniversityUS2.4k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR2.4k papers
- Massachusetts Institute of TechnologyUS2.4k papers
- University of Illinois Urbana-ChampaignUS2.4k papers
- University College LondonGB2.3k papers
- Fermi National Accelerator LaboratoryUS2.3k papers
1,062 papers · 1 filter
Review of Observational Evidence for Dark Matter in the Universe and in upcoming searches for Dark Stars
Katherine Freese
Over the past decade, a consensus picture has emerged in which roughly a quarter of the universe consists of dark matter. The observational evidence for the existence of dark matte…
MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. V. Multi-epoch VLBA Images
M. L. Lister, H. D. Aller, M. F. Aller +9
We present images from a long term program (MOJAVE: Monitoring of Jets in AGN with VLBA Experiments) to survey the structure and evolution of parsec-scale jet phenomena associated…
Effects of Magnetic Field Strength and Orientation on Molecular Cloud Formation
F. Heitsch, J. M. Stone, L. W. Hartmann
We present a set of numerical simulations addressing the effects of magnetic field strength and orientation on the flow-driven formation of molecular clouds. Fields perpendicular t…
Shock Speed, Cosmic Ray Pressure, and Gas Temperature in the Cygnus Loop
Greg Salvesen, John C. Raymond, Richard J. Edgar
Upper limits on the shock speeds in supernova remnants can be combined with post-shock temperatures to obtain upper limits on the ratio of cosmic ray to gas pressure (P_CR / P_G) b…
The Graininess of Dark Matter Haloes
Marcel Zemp, Jürg Diemand, Michael Kuhlen +5
We use the recently completed one billion particle Via Lactea II LambdaCDM simulation to investigate local properties like density, mean velocity, velocity dispersion, anisotropy,…
Double quasars: probes of black hole scaling relationships and merger scenarios
Gary Foreman, Marta Volonteri, Massimo Dotti
We analyze the available sample of double quasars, and investigate their physical properties. Our sample comprises 85 pairs, selected from the Sloan Digital Sky Survey (SDSS). We d…
The high-energy emission from GX 339-4 as seen with INTEGRAL and XMM-Newton
M. D. Caballero-Garcia, J. M. Miller, A. C. Fabian
GX 339--4 is a well-known microquasar. In this contribution we show the obtained results with the INTEGRAL and XMM-Newton observatories of the outburst undertaken on 2007. The obse…
Neutral H density at the termination shock: a consolidation of recent results
M. Bzowski, E. Moebius, S. Tarnopolski +2
We discuss a consolidation of determinations of the density of neutral interstellar H at the nose of the termination shock carried out with the use of various data sets, techniques…
Long term optical and X-ray variability of the Seyfert galaxy Markarian 79
E. Breedt, P. Arévalo, I. M. McHardy +8
We present the results of concurrent X-ray and optical monitoring of the Seyfert 1 galaxy Mrk 79 over a period of more than five years. We find that on short to medium time-scales…
Cross-Calibration of Cluster Mass-Observables
Carlos Cunha
This paper is a first step towards developing a formalism to optimally extract dark energy information from number counts using multiple cluster observation techniques. We use a Fi…
Intensity Distribution and Luminosity Function of the Swift Gamma-Ray Bursts
Xinyu Dai
Using the sample of long Gamma-ray bursts (GRBs) detected by Swift-BAT before June 2007, we measure the cumulative distribution of the peak photon fluxes (log N - log P) of the Swi…
Evolution of Dark Matter Phase-Space Density Distributions in Equal-Mass Halo Mergers
Ileana M. Vass, Stelios Kazantzidis, Monica Valluri +1
We use dissipationless N-body simulations to investigate the evolution of the true coarse-grained phase-space density distribution f(x,v) in equal-mass mergers between dark matter…
The Disruption and Fueling of M33
M. E. Putman, J. E. G. Peek, A. Muratov +7
The disruption of the M33 galaxy is evident from its extended gaseous structure. We present new data from the Galactic Arecibo L-Band Feed Array HI (GALFA-HI) Survey that show the…
Apparent shape of super-spinning black holes
Cosimo Bambi, Katherine Freese
We consider the possibility that astrophysical Black Holes (BHs) can violate the Kerr bound; i.e., they can have angular momentum greater than BH mass, . We discuss implicat…
The Seventh Data Release of the Sloan Digital Sky Survey
K. Abazajian
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDS…
High-resolution studies of the twin jet in NGC 1052
E. Ros, M. Kadler, Y. Y. Kovalev +3
The radio loud galaxy NGC 1052 is being studied in an intensive multi-band campaign including X-ray brigthness monitoring and spectroscopic observations, single-dish radio brightne…
The optical/X-ray connection: ICM iron content and galaxy optical luminosity in 20 galaxy clusters
T. F. Lagana, R. A. Dupke, L. Sodre +2
X-ray observations of galaxy clusters have shown that the intra-cluster gas has iron abundances of about one third of the solar value. These observations also show that part (if no…
Dust Processing and Grain Growth in Protoplanetary Disks in the Taurus-Auriga Star-Forming Region
B. A. Sargent, W. J. Forrest, C. Tayrien +9
Mid-infrared spectra of 65 T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope are modeled using dust at two temperatures to probe t…
Astrometry with the Keck-Interferometer: the ASTRA project and its science
Jorg-Uwe Pott, Julien Woillez, Rachel L. Akeson +22
The sensitivity and astrometry upgrade ASTRA of the Keck Interferometer is introduced. After a brief overview of the underlying interferometric principles, the technology and conce…
Clean Kinematic Samples in Dwarf Spheroidals: An Algorithm for Evaluating Membership and Estimating Distribution Parameters When Contamination is Present
Matthew G. Walker, Mario Mateo, Edward W. Olszewski +2
(abridged) We develop an algorithm for estimating parameters of a distribution sampled with contamination, employing a statistical technique known as ``expectation maximization'' (…
Non-steady Accretion in Protostars
Zhaohuan Zhu, Lee Hartmann, Charles Gammie
Observations indicate that mass accretion rates onto low-mass protostars are generally lower than the rates of infall to their disks; this suggests that much of the protostellar ma…
The X-Ray Environment During the Epoch of Terrestrial Planet Formation: Chandra Observations of h Persei
Thayne Currie, Nancy Remage Evans, Brad Spitzbart +5
We describe Chandra/ACIS-I observations of the massive ~ 13--14 Myr-old cluster, h Persei, part of the famous Double Cluster (h and chi Persei) in Perseus. Combining the list of Ch…
The Keck Aperture Masking Experiment: spectro-interferometry of 3 Mira Variables from 1.1 to 3.8 microns
H. C. Woodruff, M. J. Ireland, P. G. Tuthill +6
We present results from a spectro-interferometric study of the Miras o Cet, R Leo and W Hya obtained with the Keck Aperture Masking Experiment from 1998 Sep to 2002 Jul. The spectr…
Stationary Configurations Imply Shift Symmetry: No Bondi Accretion for Quintessence / k-Essence
Ratindranath Akhoury, Christopher S. Gauthier, Alexander Vikman
In this paper we show that, for general scalar fields, stationary configurations are possible for shift symmetric theories only. This symmetry with respect to constant translations…