Can disk-magnetosphere interaction models and beat frequency models for quasi-periodic oscillation in accreting X-ray pulsars be reconciled?In this paper we review some aspects of the theory of magnetic threaded disks. We discuss in particular the equations that determine the position of the inner disk boundary by using different…E. Bozzo, L. Stella, M. Vietri et al.·Nov 1, 2008SaveLearn
Quark-Novae, cosmic reionization, and early r-process element productionWe examine the case for Quark-Novae (QNe) as possible sources for the reionization and early metal enrichment of the universe. Quark-Novae are predicted to arise from the explosive collapse (and…R. Ouyed, R. E. Pudritz, P. Jaikumar·Oct 31, 2008SaveLearn
Accelerated expansion of a universe containing a self-interacting Bose-Einstein gasAcceleration of the universe is obtained from a model of non-relativistic particles with a short-range attractive interaction, at low enough temperature to produce a Bose-Einstein condensate.…German Izquierdo, Jaime Besprosvany·Oct 31, 2008SaveLearn
The Atomic to Molecular Transition in Galaxies. II: HI and H2 Column DensitiesGas in galactic disks is collected by gravitational instabilities into giant atomic-molecular complexes, but only the inner, molecular parts of these structures are able to collapse to form stars.…Mark R. Krumholz, Christopher F. McKee, Jason Tumlinson·Oct 31, 2008SaveLearn
A Second Case of Variable Na I D Lines in a Highly-Reddened Type Ia Supernova (with Erratum)(Original) Recent high-resolution spectra of the Type Ia SN 2006X have revealed the presence of time-variable and blueshifted Na I D features, interpreted by Patat et al. as originating in…S. Blondin, J. L. Prieto, F. Patat et al.·Oct 31, 2008SaveLearn
Transit infrared spectroscopy of the hot neptune around GJ 436 with the Hubble Space TelescopeThe nearby transiting system GJ 436b offers a unique opportunity to probe the structure and atmosphere of an extra-solar "hot Neptune". In this Letter, we present the main results of…F. Pont, R. L. Gilliland, H. Knutson et al.·Oct 31, 2008SaveLearn
Low temperature Rosseland opacities with varied abundances of carbon and nitrogenWe attempt to produce low temperature opacity data incorporating the effects of varied abundances of the elements carbon and nitrogen. For our temperature range of interest, molecules represent the…Michael T. Lederer, Bernhard Aringer·Oct 31, 2008SaveLearn
Can higher curvature corrections cure the singularity problem in f(R) gravity?Although f(R) modified gravity models can be made to satisfy solar system and cosmological constraints, it has been shown that they have the serious drawback of the nonexistence of stars with…Tsutomu Kobayashi, Kei-ichi Maeda·Oct 31, 2008SaveLearn
New Primordial-Magnetic-Field Limit from The Latest LIGO S5 dataSince the energy momentum tensor of a magnetic field always contains a spin-2 component in its anisotropic stress, stochastic primordial magnetic field (PMF) in the early universe must generate…Shuang Wang·Oct 31, 2008SaveLearn
Supernova Explosions and the Triggering of Galactic Fountains and OutflowsWe review here the effects of supernovae (SNe) explosions on the environment of star-forming galaxies. Randomly distributed, clustered SNe explosions cause the formation of hot superbubbles that…E. M. de Gouveia Dal Pino, C. Melioli, A. D'Ercole et al.·Oct 31, 2008SaveLearn
The minimum stellar metallicity observable in the GalaxyThe first stars fundamentally transformed the early Universe through their production of energetic radiation and the first heavy chemical elements. The impact on cosmic evolution sensitively depends…Anna Frebel, Jarrett L. Johnson, Volker Bromm·Oct 31, 2008SaveLearn
Kolmogorov-Smirnov test as a tool to study the distribution of ultra-high energy cosmic ray sourcesWe analyze in detail the two-dimensional Kolmogorov-Smirnov test as a tool to learn about the distribution of the sources of the ultra-high energy cosmic rays. We confront in particular models based…Diego Harari, Silvia Mollerach, Esteban Roulet·Oct 31, 2008SaveLearn
Star Formation in the rho Ophiuchi Molecular CloudA review of star formation in the Rho Ophiuchi molecular complex is presented, with particular emphasis on studies of the main cloud, L1688, since 1991. Recent photometric and parallax measurements…Bruce Wilking, Marc Gagne, Lori Allen·Oct 31, 2008SaveLearn
Secular Evolution of HD 12661: A System Caught at an Unlikely TimeThe eccentricity evolution of multiple planet systems can provide valuable constraints on planet formation models. Unfortunately, the inevitable uncertainties in the current orbital elements can lead…Dimitri Veras, Eric B. Ford·Oct 31, 2008SaveLearn
GalICS II: the [alpha/Fe]-mass relation in elliptical galaxiesWe aim at reproducing the mass- and sigma-[alpha/Fe] relations in the stellar populations of early-type galaxies by means of a cosmologically motivated assembly history for the spheroids. We…A. Pipino, J. E. G. Devriendt, D. Thomas et al.·Oct 31, 2008SaveLearn
Radio Interferometric Calibration Using The SAGE AlgorithmRadio Interferometry is an essential method for astronomical observations. Self-calibration techniques have increased the quality of the radio astronomical observations (and hence the science) by…Sarod Yatawatta, Saleem Zaroubi, Ger de Bruyn et al.·Oct 31, 2008SaveLearn
Solar surface emerging flux regions: a comparative study of radiative MHD modeling and Hinode SOT observationsWe present results from numerical modeling of emerging flux regions on the solar surface. The modeling was carried out by means of 3D radiative MHD simulations of the rise of buoyant magnetic flux…M. C. M. Cheung, M. Schuessler, T. D. Tarbell et al.·Oct 31, 2008SaveLearn
CTA simulations with CORSIKA/simtelarrayWhile current atmospheric Cherenkov installations consist of only a few telescopes each, future installations will be far more complex. Monte Carlo simulations have become an essential tool for the…Konrad Bernloehr·Oct 31, 2008SaveLearn
BeppoSAX Observations of the Power and Energy Spectral Evolution in the Black Hole Candidate XTE J1650-500We study the time variability and spectral evolution of the Black Hole Candidate source XTE J1650-500 using the BeppoSax wide energy range (0.12-200 keV) observations performed during the 2001 X-ray…Enrico Montanari, Lev Titarchuk, Filippo Frontera·Oct 31, 2008SaveLearn
PCA of the spectral energy distribution and emission line properties of red 2MASS AGNWe analyze the spectral energy distributions (SEDs) and emission line properties of the red (J-KS > 2) 2MASS AGN observed by Chandra using principle component analysis. The sample includes 44 low…Joanna Kuraszkiewicz, Belinda J. Wilkes, Gary Schmidt et al.·Oct 31, 2008SaveLearn
The observation of Extensive Air Showers from SpaceWe summarise some basic issues relevant to the optimisation and design of space-based experiments for the observation of the Extensive Air Showers produced by Ultra-High Energy Cosmic Particles…M. Pallavicini, R. Pesce, A. Petrolini et al.·Oct 31, 2008SaveLearn
The Spectral Energy Distributions of Red 2MASS AGNWe present infrared (IR) to X-ray spectral energy distributions (SEDs) for 44 red AGN selected from the 2MASS survey on the basis of their red J-KS color (>2 mag) and later observed by Chandra. In…Joanna Kuraszkiewicz, Belinda J. Wilkes, Gary Schmidt et al.·Oct 31, 2008SaveLearn
Discovery of a 30 day period in the supergiant fast X-ray transient SAX J1818.6-1703SAX J1818.6-1703 has been characterised as a Supergiant Fast X-ray Transient system on the basis of several INTEGRAL/IBIS detections since the original BeppoSAX Wide Field Camera detection. Using…A. J. Bird, A. Bazzano, A. B. Hill et al.·Oct 31, 2008SaveLearn
Design, analysis and test of a microdots apodizer for the Apodized Pupil Lyot CoronagraphCoronagraphic techniques are required to detect exoplanets with future Extremely Large Telescopes. One concept, the Apodized Pupil Lyot Coronagraph (APLC), is combining an apodizer in the entrance…P. Martinez, C. Dorrer, E. Aller Carpentier et al.·Oct 31, 2008SaveLearn
The origin of the infrared emission in radio galaxies II: analysis of mid- to far-infrared Spitzer observations of the 2Jy sampleWe present an analysis of deep mid- to far-infrared (MFIR) Spitzer photometric observations of the southern 2Jy sample of powerful radio sources (0.05 < z < 0.7), conducting a statistical…D. Dicken, C. Tadhunter, D. Axon et al.·Oct 31, 2008SaveLearn