output
19912026
Showing 2009Show all

385 papers · 1 filter

astro-ph.HE2009★ 205 cited

Fermi observations of Cassiopeia and Cepheus: diffuse gamma-ray emission in the outer Galaxy

LAT collaboration

We present the analysis of the interstellar gamma-ray emission measured by the Fermi Large Area Telescope toward a region in the second Galactic quadrant at 100 deg < l < 145 deg a…

hep-ex2009★ 28 cited

A study of the associated production of photons and b-quark jets in p-pbar collisions at sqrt{s} = 1.96 TeV

CDF collaboration

The cross section for photon production in association with at least one jet containing a -quark hadron has been measured in proton antiproton collisions at TeV.…

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…

astro-ph.HE2009★ 56 cited

Magnetar Twists: Fermi/Gamma ray Burst Monitor (GBM) detection of SGR J1550-5418

Y. Kaneko, E. Gogus, C. Kouveliotou +12

SGR J1550-5418 (previously known as AXP 1E 1547.0-5408 or PSR J1550-5418) went into three active bursting episodes in 2008 October and in 2009 January and March, emitting hundreds…

math.DG2009

Curve Singularities and Monster / Semple Towers

Alex L. Castro, Richard Montgomery

In earlier work, we introduced the `Monster tower', a tower of fibrations associated to planar curves. We constructed an algorithm for classifying its points with respect to the eq…

hep-ex2009★ 81 cited

A Search for B+ -> tau+ nu Recoiling Against B- -> D0 l- nu X

The BABAR Collaboration, B. Aubert

We present a search for the decay () in pairs recorded with the BABAR detector at the PEP-II B-Facto…

astro-ph.SR2009★ 57 cited

A long-period planet orbiting a nearby Sun-like star

Hugh R. A. Jones, R. Paul Butler, C. G. Tinney +10

The Doppler wobble induced by the extra-solar planet HD 134987b was first detected by data from the Keck Telescope nearly a decade ago, and was subsequently confirmed by data from…

astro-ph.EP2009★ 122 cited

A Super-Earth and two Neptunes Orbiting the Nearby Sun-like star 61 Virginis

Steven S. Vogt, Robert A. Wittenmyer, R. Paul Butler +10

We present precision radial velocity (RV) data that reveal a multiple exoplanet system orbiting the bright nearby G5V star 61 Virginis. Our 4.6 years of combined Keck/HIRES and Ang…

astro-ph.EP2009★ 37 cited

A Super-Earth Orbiting the Nearby Sun-like Star HD 1461

Eugenio J. Rivera, R. Paul Butler, Steven S. Vogt +3

We present precision radial velocity data that reveal a Super-Earth mass planet and two probable additional planets orbiting the bright nearby G0V star HD 1461. Our 12.8 years of K…

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.GA2009★ 230 cited

Dark Matter Direct Detection with Non-Maxwellian Velocity Structure

M. Kuhlen, N. Weiner, J. Diemand +5

The velocity distribution function of dark matter particles is expected to show significant departures from a Maxwell-Boltzmann distribution. This can have profound effects on the…

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…

astro-ph.CO2009★ 1k cited

The Spectral Energy Distribution of Fermi bright blazars

A. A. Abdo, M. Ackermann, M. Ajello +107

(Abridged) We have conducted a detailed investigation of the broad-band spectral properties of the γ-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining ou…

astro-ph.HE2009★ 76 cited

Fermi Large Area Telescope Observations of the Cosmic-Ray Induced gamma-ray Emission of the Earth's Atmosphere

LAT collaboration

We report on measurements of the cosmic-ray induced gamma-ray emission of Earth's atmosphere by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. The LAT has ob…

astro-ph.CO2009★ 186 cited

The Effect of Gas Fraction on the Morphology and Time-scales of Disc Galaxy Mergers

Jennifer M. Lotz, Patrik Jonsson, T. J. Cox +1

Gas-rich galaxy mergers are more easily identified by their disturbed morphologies than mergers with less gas. Because the typical gas fraction of galaxy mergers is expected to inc…

astro-ph.CO2009★ 251 cited

The Effect of Mass Ratio on the Morphology and Time-scales of Disc Galaxy Mergers

Jennifer M. Lotz, Patrik Jonsson, T. J. Cox +1

The majority of galaxy mergers are expected to be minor mergers. The observational signatures of minor mergers are not well understood, thus there exist few constraints on the mino…

hep-ph2009★ 6 cited

Fixing the Pole in the Pyramid

Tom Banks, Jean-François Fortin, Scott Kathrein

We revisit the problem of the hidden sector Landau pole in the Pyramid Scheme. There is a fixed line in the plane of hidden sector gauge coupling and a Yukawa coupling between the…

astro-ph.HE2009★ 171 cited

Fermi Large Area Telescope Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes

LAT Collaboration

The diffuse Galactic gamma-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experime…

hep-ex2009★ 83 cited

Search for Fermion-Pair Decays $Q\Qbar \to (\t\Wmp)(\tbar\Wpm)$ in Same-Charge Dilepton Events

The CDF Collaboration

We report the most restrictive direct limits on masses of fourth-generation down-type quarks , and quark-like composite fermions ( or ), decaying promptly t…

astro-ph.EP2009★ 97 cited

Protoplanetary migration in turbulent isothermal disks

C. Baruteau, D. N. C. Lin

In order to reproduce the statistical properties of the observed exoplanets, population synthesis models have shown that the migration of protoplanets should be significantly slowe…

astro-ph.CO2009★ 78 cited

Discovery of very high energy gamma rays from PKS 1424+240 and multiwavelength constraints on its redshift

The VERITAS Collaboration, V. A. Acciari, The Fermi Collaboration +4

We report the first detection of very-high-energy (VHE) gamma-ray emission above 140 GeV from PKS 1424+240, a BL Lac object with an unknown redshift. The photon spectrum above 140…

astro-ph.CO2009★ 818 cited

The Growth of Massive Galaxies Since z=2

Pieter G. van Dokkum, Katherine E. Whitaker, Gabriel Brammer +11

We study the growth of massive galaxies from z=2 to the present using data from the NEWFIRM Medium Band Survey. The sample is selected at a constant number density of n=2x10^-4 Mpc…

astro-ph.EP2009★ 359 cited

The Interior Structure, Composition, and Evolution of Giant Planets

Jonathan J. Fortney, Nadine Nettelmann

We discuss our current understanding of the interior structure and thermal evolution of giant planets. This includes the gas giants, such as Jupiter and Saturn, that are primarily…

astro-ph.CO2009★ 314 cited

A candidate redshift z ~ 10 galaxy and rapid changes in that population at an age of 500 Myr

R. J. Bouwens, G. D. Illingworth, I. Labbe +9

Searches for very-high-redshift galaxies over the past decade have yielded a large sample of more than 6,000 galaxies existing just 900-2,000 million years (Myr) after the Big Bang…