Showing 2009Show all

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hep-ex2009★ 84 cited

Determination of the strong coupling constant from the inclusive jet cross section in ppbar collisions at sqrt(s)=1.96 TeV

D0 Collaboration, V. M. Abazov

We determine the strong coupling constant alphas and its energy dependence from the pT dependence of the inclusive jet cross section in ppbar collisions at sqrt(s)=1.96 TeV. The st…

hep-lat2009★ 5 cited

The Ds and D+ Leptonic Decay Constants from Lattice QCD

A. Bazavov, C. Bernard, C. DeTar +16

We present the leptonic decay constants fDs and fD+ computed on the MILC collaboration's 2+1 flavor asqtad gauge ensembles. We use clover heavy quarks with the Fermilab interpretat…

astro-ph.SR2009★ 217 cited

Discovery of a Faint Companion to Alcor Using MMT/AO 5 m Imaging

Eric E. Mamajek, Matthew A. Kenworthy, Philip M. Hinz +1

We report the detection of a faint stellar companion to the famous nearby A5V star Alcor (80 UMa). The companion has M-band ( = 4.8 m) magnitude 8.8 and projected separation…

hep-th2009★ 71 cited

On the Inconsistency of Fayet-Iliopoulos Terms in Supergravity Theories

Keith R. Dienes, Brooks Thomas

Motivated by recent discussions, we revisit the issue of whether globally supersymmetric theories with non-zero Fayet-Iliopoulos terms may be consistently coupled to supergravity.…

astro-ph.HE2009★ 69 cited

3D simulations of supernova remnants evolution including non-linear particle acceleration

Gilles Ferrand, Anne Decourchelle, Jean Ballet +2

If a sizeable fraction of the energy of supernova remnant shocks is channeled into energetic particles (commonly identified with Galactic cosmic rays), then the morphological evolu…

astro-ph.SR2009★ 4 cited

Drift effects and the average features of cosmic ray density gradient in CIRs during successive two solar minimum periods

A. Fushishita, Y. Okazaki, T. Narumi +14

We deduce on hourly basis the spatial gradient of the cosmic ray density in three dimensions from the directional anisotropy of high-energy (~50 GeV) galactic cosmic ray (GCR) inte…

astro-ph.EP2009★ 46 cited

The Hayabusa Spacecraft Asteroid Multi-Band Imaging Camera: AMICA

Masateru Ishiguro, Ryosuke Nakamura, David J. Tholen +12

The Hayabusa Spacecraft Asteroid Multiband Imaging Camera (AMICA) has acquired more than 1400 multispectral and high-resolution images of its target asteroid, 25143 Itokawa, since…

astro-ph.CO2009★ 416 cited

The X-ray to optical-UV luminosity ratio of X-ray selected Type 1 AGN in XMM-COSMOS

E. Lusso, A. Comastri, C. Vignali +29

We present a study of the X-ray to optical properties of a sample of 545 X-ray selected Type 1 AGN, from the XMM-COSMOS survey, over a wide range of redshifts ($0.04<\z<4.25$) and…

cond-mat.quant-gas2009★ 409 cited

Observation of vortex dipoles in an oblate Bose-Einstein condensate

T. W. Neely, E. C. Samson, A. S. Bradley +2

We report experimental observations and numerical simulations of the formation, dynamics, and lifetimes of single and multiply charged quantized vortex dipoles in highly oblate dil…

astro-ph.HE2009★ 99 cited

Coordinated Fermi/Optical Monitoring of Blazars and the Great 2009 September Gamma-ray Flare of 3C 454.3

P. S. Smith, E. Montiel, S. Rightley +3

We describe the optical spectropolarimetric monitoring program at Steward Observatory centered around gamma-ray-bright blazars and the LAT Monitored Source List planned for Fermi C…

astro-ph.CO2009★ 27 cited

The central energy source of 70micron-selected galaxies: Starburst or AGN?

M. Symeonidis, D. Rosario, A. Georgakakis +3

We present the first AGN census in a sample of 61 galaxies selected at 70microns, a wavelength which should strongly favour the detection of star-forming systems. For the purpose o…

nucl-th2009★ 26 cited

Effective interactions for light nuclei: an effective (field theory) approach

I. Stetcu, J. Rotureau, B. R. Barrett +1

One of the central open problems in nuclear physics is the construction of effective interactions suitable for many-body calculations. We discuss a recently developed approach to t…

astro-ph.SR2009★ 11 cited

Turbulent Mixing in Stars: Theoretical Hurdles

W. David Arnett, Casey Meakin

A program is outlined, and first results described, in which fully three-dimensional, time dependent simulations of hydrodynamic turbulence are used as a basis for theoretical inve…

astro-ph.CO2009★ 205 cited

The Persistence of Cool Galactic Winds in High Stellar Mass Galaxies Between z~1.4 and ~1

Kate H. R. Rubin, Benjamin J. Weiner, David C. Koo +4

We present an analysis of the MgII 2796, 2803 and FeII 2586, 2600 absorption line profiles in coadded spectra of 468 galaxies at 0.7 < z < 1.5. The galaxy sample, drawn from the Te…

astro-ph.EP2009★ 315 cited

Transmission Spectra of Three-Dimensional Hot Jupiter Model Atmospheres

J. J. Fortney, M. Shabram, A. P. Showman +4

We compute models of the transmission spectra of planets HD 209458b, HD 189733b, and generic hot Jupiters. We examine the effects of temperature, surface gravity, and metallicity f…

math.AP2009

Mathematics of Photoacoustic and Thermoacoustic Tomography

Peter Kuchment, Leonid Kunyansky

This is the manuscript of the chapter for a planned Handbook of Mathematical Methods in Imaging that surveys the mathematical models, problems, and algorithms of the Thermoacoustic…

astro-ph.EP2009★ 9 cited

Constraints on the Source of Lunar Cataclysm Impactors

Matija Cuk, Brett J. Gladman, Sarah T. Stewart

Multiple impact basins formed on the Moon about 3.8 Gyr ago in what is known as the lunar cataclysm or late heavy bombardment. Many workers currently interpret the lunar cataclysm…

astro-ph.CO2009★ 424 cited

The GALEX Arecibo SDSS Survey. I. Gas Fraction Scaling Relations of Massive Galaxies and First Data Release

Barbara Catinella, David Schiminovich, Guinevere Kauffmann +23

We introduce the GALEX Arecibo SDSS Survey (GASS), an on-going large program that is gathering high quality HI-line spectra using the Arecibo radio telescope for an unbiased sample…

astro-ph.EP2009★ 65 cited

CoRoT-7 b: Super-Earth or Super-Io?

Rory Barnes, Sean N. Raymond, Richard Greenberg +2

CoRoT-7 b, a planet about 70% larger than the Earth orbiting a Sun-like star, is the first-discovered rocky exoplanet, and hence has been dubbed a "super-Earth". Some initial studi…

hep-ex2009★ 22 cited

Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data

KTeV collaboration, E. Abouzaid et al., V. Bernard +3

Using the published KTeV samples of K_L --> pi^{\pm} e^{\mp} nu and K_L --> pi^{\pm} mu^{\mp} nu decays [1], we perform a reanalysis of the scalar and vector form factors based on…

hep-lat2009★ 3 cited

The strange quark content of the nucleon in 2+1 flavor lattice QCD

Walter Freeman, Doug Toussaint

The strangeness of the nucleon, <N|ss|N> - <0|ss|0>, is a quantity of interest for interpreting the results of dark matter detection experiments as well as for exploring the struct…

hep-ex2009★ 12 cited

Search for the associated production of a b quark and a neutral supersymmetric Higgs boson which decays to tau pairs

D0 Collaboration, V. M. Abazov

We report results from a search for production of a neutral Higgs boson in association with a quark. We search for Higgs decays to pairs with one subsequently decaying…

astro-ph.CO2009★ 128 cited

Enhanced Dense Gas Fraction in Ultra-Luminous Infrared Galaxies

S. Juneau, D. T. Narayanan, J. Moustakas +4

We present a detailed analysis of the relation between infrared luminosity and molecular line luminosity, for a variety of molecular transitions, using a sample of 34 nearby galaxi…

cond-mat.mes-hall2009★ 6 cited

Spatial mapping of the Dirac point in monolayer and bilayer graphene

A. Deshpande, W. Bao, Z. Zhao +2

We have mapped the Dirac point in exfoliated monolayer and bilayer graphene using spatially resolved scanning tunneling spectroscopy (STS) measurements at low temperature. The Dira…