The EUV Sun as the superposition of elementary SunsMany studies assume that the solar irradiance in the EUV can be decomposed into different contributions, which makes the modelling of the spectral variability considerably easier. We consider a…P. -O. Amblard, S. Moussaoui, T. Dudok de Wit et al.·Sep 3, 2008SaveLearn
On a Scattered-Disk Origin for the 2003 El61 Collisional Family - an Example of the Importance of Collisions on the Dynamics of Small BodiesThe recent discovery of the 2003EL61 collisional family in the Kuiper belt (Brown et al., 2007) is surprising because the formation of such a family is a highly improbable event in today's belt.…Harold F. Levison, Morbidelli Alessandro, David Vokrouhlicky et al.·Sep 3, 2008SaveLearn
Far-Infrared Properties of Blue Compact Dwarf Galaxies Observed with AKARI/Far-Infrared Surveyor (FIS)We report basic far-infrared (FIR) properties of eight blue compact dwarf galaxies (BCDs) observed by AKARI. We measure the fluxes at the four FIS bands (wavelengths of 65 um, 90 um, 140 um, and 160…Hiroyuki Hirashita, Hidehiro Kaneda, Takashi Onaka et al.·Sep 3, 2008SaveLearn
Use of neural networks for the identification of new z>=3.6 QSOs from FIRST-SDSS DR5We aim to obtain a complete sample of redshift > 3.6 radio QSOs from FIRST sources having star-like counterparts in the SDSS DR5 photometric survey (r<=20.2). We found that simple supervised neural…R. Carballo, J. I. Gonzalez-Serrano, C. R. Benn et al.·Sep 3, 2008SaveLearn
The Void Abundance with Non-Gaussian Primordial PerturbationsWe use a Press-Schechter-like calculation to study how the abundance of voids changes in models with non-Gaussian initial conditions. While a positive skewness increases the cluster abundance, a…Marc Kamionkowski, Licia Verde, Raul Jimenez·Sep 3, 2008SaveLearn
The properties of the host galaxy and the immediate environment of GRB 980425 / SN 1998bw from the multi-wavelength spectral energy distributionWe present an analysis of the spectral energy distribution (SED) of the galaxy ESO 184-G82, the host of the closest known long gamma-ray burst (GRB) 980425 and its associated supernova (SN) 1998bw.…Michał J. Michałowski, Jens Hjorth, Daniele Malesani et al.·Sep 2, 2008SaveLearn
Dark Matter CausticsCaustics are a generic feature of the nonlinear growth of structure in the dark matter distribution. If the dark matter were absolutely cold, its mass density would diverge at caustics, and the…Simon D. M. White, Mark Vogelsberger·Sep 2, 2008SaveLearn
User Guide for the Discrete Dipole Approximation Code DDSCAT 7.0DDSCAT 7.0 is an open-source Fortran-90 software package applying the discrete dipole approximation to calculate scattering and absorption of electromagnetic waves by targets with arbitrary…B. T. Draine, P. J. Flatau·Sep 2, 2008SaveLearn
Accretion-disc model spectra for dwarf-nova starsRadiation from accretion discs in cataclysmic variable stars (CVs) provides fundamental information about the properties of these close binary systems and about the physics of accretion in general.…Irit Idan, Jean-Pierre Lasota, Jean-Marie Hameury et al.·Sep 2, 2008SaveLearn
Reopening the window on charged dark matterWe reexamine the limits on charged dark matter particles. We show that if their mass and charge fall in the range 100(qX/e)2< mX < 108(qX/e) TeV, then magnetic fields prevent particles in the…Leonid Chuzhoy, Edward W. Kolb·Sep 2, 2008SaveLearn
The death of massive stars - I. Observational constraints on the progenitors of type II-P supernovaeWe present the results of a 10.5 yr, volume limited (28 Mpc) search for supernova (SN) progenitor stars. We compile all SNe discovered within this volume (132, of which 27% are type Ia) and determine…S. J. Smartt, J. J. Eldridge, R. M. Crockett et al.·Sep 2, 2008SaveLearn
Analysis of extremely low signal-to-noise ratio data from INTEGRAL/PICsITThe PICsIT detector onboard the INTEGRAL satellite was designed to provide information about emission in the soft gamma-ray band for many bright sources. Due to strong and variable instrumental…Piotr Lubinski·Sep 2, 2008SaveLearn
Stable magnetic equilibria and their evolution in the upper main sequence, white dwarfs, and neutron stars[abbreviated] Long-lived, large-scale magnetic field configurations exist in upper main sequence, white dwarf, and neutron stars. Externally, these fields have a strong dipolar component, while their…Andreas Reisenegger·Sep 2, 2008SaveLearn
Revised fits to α/α in consistency with the accelerating universeAn attempt is made for a new type of analysis of the time-variability of the fine-structure constant trying to fit the most recent result from the laboratory measurements, the Oklo constraint and the…Yasunori Fujii·Sep 2, 2008SaveLearn
Image of another universe being observed through a wormhole throatWe consider a technique of calculating deflection of the light passing through wormholes (from one universe to another). We find fundamental and characteristic features of electromagnetic radiation…Alexander Shatskiy·Sep 2, 2008SaveLearn
Precessing planetary magnetospheres in SiO stars ? First detection of quasi-periodic polarization fluctuations in R Leo and V CamThe origin of magnetism around AGB stars is uncertain. If these stars drive a dynamo, it cannot be sufficient to generate a strong global field, otherwise the observed X-ray luminosities would be…Helmut W. Wiesemeyer, Clemens Thum, Alain Baudry et al.·Sep 2, 2008SaveLearn
Neutrino mass spectrum from gravitational waves generated by double neutrino spin-flip in supernovaeThe supernova (SN) neutronization phase produces mainly electron (νe) neutrinos, the oscillations of which must take place within a few mean-free-paths of their resonance surface located nearby…Herman J. Mosquera Cuesta, Gaetano Lambiase·Sep 2, 2008SaveLearn
Infrared Imaging of SDSS Quasars: Implications for the Quasar K correctionWe have imaged 45 quasars from the Sloan Digital Sky Survey (SDSS) with redshifts 1.85 < z < 4.26 in JHKs with the KPNO SQIID imager. By combining these data with optical magnitudes from the SDSS we…Julia Kennefick, Shelly Bursick·Sep 2, 2008SaveLearn
Formation of quark phases in compact stars and SN explosionWe describe possible scenarios of quark deconfinement in compact stars and we analyze their astrophysical implications. The quark deconfinement process can proceed rapidly, as a strong deflagration,…Alessandro Drago, Giuseppe Pagliara, Giulia Pagliaroli et al.·Sep 2, 2008SaveLearn
Anisotropic AGN Outflows Filling The Cosmological VolumeWe simulate anisotropic outflows of AGN, and investigate the large-scale impact of the cosmological population of AGN outflows over the Hubble time by performing N-body LambdaCDM simulations. Using…Paramita Barai, Joel Germain, Hugo Martel·Sep 2, 2008SaveLearn
Formation and evolution of disk galaxiesGlobal star formation is the key to understanding galaxy disk formation. This in turn depends on gravitational instability of disks and continuing gas accretion as well as minor merging. A key…Joseph Silk·Sep 2, 2008SaveLearn
Origin and evolution of moving groups I. Characterization in the observational kinematic-age-metallicity spaceContext. Recent studies have suggested that moving groups have a dynamic or "resonant" origin. Under this hypothesis, these kinematic structures become a powerful tool for studying the…T. Antoja, F. Figueras, D. Fernandez et al.·Sep 2, 2008SaveLearn
What Makes an Accretion-Powered Millisecond Pulsar?We investigate the dependence of pulse amplitudes of accreting millisecond pulsars on the masses of the neutron stars. Because the pulsation amplitudes are suppressed as the neutron stars become more…Feryal Ozel·Sep 2, 2008SaveLearn
MOST satellite photometry of stars in the M67 field: Eclipsing binaries, blue stragglers and delta-Scuti variablesWe present two series of MOST (Microvariability & Oscillations of STars) space-based photometry, covering nearly continuously 10 days in 2004 and 30 days in 2007, of selected variable stars in the…Theodor Pribulla, Slavek Rucinski, Jaymie M. Matthews et al.·Sep 2, 2008SaveLearn
Near-Infrared Photometry of Four Stellar Clusters in the Small Magellanic CloudWe present high-quality J, H and K photometry of four Small Magellanic Cloud stellar clusters with intermediate ages in the 1-7 Gyr range (namely NGC 339, 361, 416 and 419) . We obtained deep…Alessio Mucciarelli, Livia Origlia, Claudia Maraston et al.·Sep 2, 2008SaveLearn