Accretion onto Intermediate-Mass Black Holes in Dense Protogalactic CloudsWe present the first results from two-dimensional simulations of radiatively-efficient accretion of metal-free gas onto intermediate-mass black holes. We fix the shape of the spectral energy…Milos Milosavljevic, Sean M. Couch, Volker Bromm·Dec 13, 2008SaveLearn
Shock Speed, Cosmic Ray Pressure, and Gas Temperature in the Cygnus LoopUpper 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 (PCR / PG) behind the shocks.…Greg Salvesen, John C. Raymond, Richard J. Edgar·Dec 13, 2008SaveLearn
The anisotropic redshift space galaxy correlation function: detection on the BAO RingIn a series of papers we have recently studied the clustering of LRG galaxies in the latest spectroscopic SDSS data release, which has 75000 LRG galaxies sampling 1.1 Gpc3/h3 to z=0.47. Here we…Enrique Gaztanaga, Anna Cabre·Dec 13, 2008SaveLearn
Howes et al. ReplyHowes et al. Reply to Comment on "Kinetic Simulations of Magnetized Turbulence in Astrophysical Plasmas" arXiv:0711.4355G. G. Howes, S. C. Cowley, W. Dorland et al.·Dec 12, 2008SaveLearn
Constraining the energy budget of GRB 080721We follow the bright, highly energetic afterglow of Swift-discovered GRB 080721 at z=2.591 out to 36 days or 3e6 s since the trigger in the optical and X-ray bands. We do not detect a break in the…R. L. C. Starling, E. Rol, A. J. van der Horst et al.·Dec 12, 2008SaveLearn
Statistical Properties of Gamma-Ray Burst PolarizationThe emission mechanism and the origin and structure of magnetic fields in gamma-ray burst (GRB) jets are among the most important open questions concerning the nature of the central engine of GRBs.…Kenji Toma, Takanori Sakamoto, Bing Zhang et al.·Dec 12, 2008SaveLearn
The Disruption and Fueling of M33The 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 full extent and…M. E. Putman, J. E. G. Peek, A. Muratov et al.·Dec 12, 2008SaveLearn
The excitation of spiral density waves through turbulent fluctuations in accretion discs II: Numerical Simulations with MRI driven turbulenceWe present fully three-dimensional local MRI simulations with the object of studying the excitation of non-axisymmetric spiral density waves that are observed to always be present in such…T. Heinemann, J. C. B. Papaloizou·Dec 12, 2008SaveLearn
On The Origin Of The Highest Redshift Gamma-Ray BurstsGRB 080913 and GRB 090423 are the most distant gamma-ray bursts (GRBs) known to-date, with spectroscopically determined redshifts of z=6.7 and z=8.1, respectively. The detection of bursts at this…Krzysztof Belczynski, Daniel E. Holz, Chris L. Fryer et al.·Dec 12, 2008SaveLearn
The Polish doughnuts revisited I. The angular momentum distribution and equipressure surfacesWe construct a new family of analytic models of black hole accretion disks in dynamical equilibria. Our construction is based on assuming distributions of angular momentum and entropy. For a…L. Qian, M. A. Abramowicz, P. C. Fragile et al.·Dec 12, 2008SaveLearn
Is the wind of the Oe star HD 155806 magnetically confined?Oe stars are a subset of the O-type stars that exhibit emission lines from a circumstellar disk. The recent detection of magnetic fields in some O-type stars suggests a possible explanation for the…V. Petit, A. W. Fullerton, S. Bagnulo et al.·Dec 12, 2008SaveLearn
Observational Evidence for Cosmological-Scale Extra DimensionsWe present a case that current observations may already indicate new gravitational physics on cosmological scales. The excess of power seen in the Lyman-alpha forest and small-scale CMB experiments,…Niayesh Afshordi, Ghazal Geshnizjani, Justin Khoury·Dec 12, 2008SaveLearn
Power spectrum of electron number density perturbations at cosmological recombination epochThe power spectrum of number density perturbations of free electrons is obtained for the epoch of cosmological recombination of hydrogen. It is shown that amplitude of the electron perturbations…B. Venhlovska, B. Novosyadlyj·Dec 12, 2008SaveLearn
A spatially resolved study of photoelectric heating and [CII] cooling in the LMC(abridged) We study photoelectric heating throughout the Large Magellanic Cloud. We quantify the importance of the [CII] cooling line and the photoelectric heating process of various environments in…D. Rubin, S. Hony, S. C. Madden et al.·Dec 12, 2008SaveLearn
Constraints on modified gravity from the observed X-ray luminosity function of galaxy clustersWe use measurements of the growth of cosmic structure, as inferred from the observed evolution of the X-ray luminosity function (XLF) of galaxy clusters, to constrain departures from General…David Rapetti, Steven W. Allen, Adam Mantz et al.·Dec 12, 2008SaveLearn
Analytical Solutions for Radiative Transfer: Implications for Giant Planet Formation by Disk InstabilityThe disk instability mechanism for giant planet formation is based on the formation of clumps in a marginally-gravitationally unstable protoplanetary disk, which must lose thermal energy through a…Alan P. Boss·Dec 12, 2008SaveLearn
A Highly Complete Spectroscopic Survey of the GOODS-N FieldWe present a table of redshifts for 2907 galaxies and stars in the 145 square arcmin HST ACS GOODS-North, making this the most spectroscopically complete redshift sample obtained to date in a field…A. J. Barger, L. L. Cowie, W. -H. Wang·Dec 12, 2008SaveLearn
A Millimetre Survey of Starburst Dominated Ultraluminous Infrared Galaxies at z~2We present millimetre observations of a sample of 12 high redshift ultraluminous infrared galaxies (ULIRGs) in the Extended Growth Strip (EGS). These objects were initially selected on the basis of…J. D. Younger, A. Omont, N. Fiolet et al.·Dec 12, 2008SaveLearn
Dynamical Simulations of the Planetary System HD69830HD 69830 exhibits radial velocity variations attributed to three planets as well as infrared emission attributed to a warm debris disk. Previous studies have developed models for the planet migration…Matthew J. Payne, Eric B. Ford, Mark C. Wyatt et al.·Dec 12, 2008SaveLearn
Kinematical Conformal Cosmology: fundamental parameters from astrophysical observationsWe continue our presentation of an alternative cosmology based on conformal gravity, following our kinematical approach introduced in a recent paper. In line with the assumptions of our model, which…Gabriele U. Varieschi·Dec 12, 2008SaveLearn
Gas and Stars in Galaxies - A Multi-Wavelength 3D PerspectiveAn overview of the ESO/Radionet workshop devoted to 3D optical/near-infrared and sub-mm/radio observations of gas and stars in galaxies is presented. There will be no published proceedings but…Matt Lehnert, Carlos De Breuck, Harald Kuntschner et al.·Dec 12, 2008SaveLearn
GMIMS: The Global Magneto-Ionic Medium SurveyThe Global Magneto-Ionic Medium Survey (GMIMS) is a project to map the diffuse polarized emission over the entire sky, Northern and Southern hemispheres, from 300 MHz to 1.8 GHz. With an angular…M. Wolleben, T. L. Landecker, E. Carretti et al.·Dec 12, 2008SaveLearn
Feeding versus Feedback in NGC 4151 probed with Gemini NIFS. I. ExcitationWe have used the Gemini Near-infrared Integral Field Spectrograph (NIFS) to map the emission-line intensity distributions and ratios in the Narrow-Line Region (NLR) of the Seyfert galaxy NGC 4151 in…T. Storchi-Bergmann, P. J. McGregor, Rogemar A. Riffel et al.·Dec 12, 2008SaveLearn
Determination of the minimum masses of heavy elements in the envelopes of Jupiter and SaturnWe calculate the minimum mass of heavy elements required in the envelopes of Jupiter and Saturn to match the observed oversolar abundances of volatiles. Because the clathration efficiency remains…Olivier Mousis, Ulysse Marboeuf, Jonathan I. Lunine et al.·Dec 12, 2008SaveLearn
Twins Among the Low Mass Spectroscopic BinariesWe report an analysis of twins of spectral types F or later in the 9th Catalog of Spectroscopic Binaries (SB9). Twins, the components of binaries with mass ratio within 2% of 1.0, are found among the…M. Simon, R. C. Obbie·Dec 12, 2008SaveLearn