Three-dimensional simulations of multiple protoplanets embedded in a protostellar discProtoplanet eccentricities of e >~ H/r can slow or reverse migration, but previous 2D studies have shown that gravitational scattering cannot maintain significant planet eccentricities against…Paul Cresswell, Richard P. Nelson·Nov 26, 2008SaveLearn
A topology for the penumbral magnetic fieldsWe describe a scenario for the sunspot magnetic field topology that may account for recent observations of upflows and downflows in penumbrae. According to our conjecture, short narrow magnetic loops…J. Sanchez Almeida·Nov 26, 2008SaveLearn
The AMS-02 Anticoincidence CounterThe AMS-02 detector will measure cosmic rays on the International Space Station. This contribution will cover production, testing, space qualification and integration of the AMS-02 anticoincidence…Ph. von Doetinchem, W. Karpinski, Th. Kirn et al.·Nov 26, 2008SaveLearn
Early evolution of newly born magnetars with a strong toroidal fieldWe present a state-of-the-art scenario for newly born magnetars as strong sources of Gravitational Waves (GWs)in the early days after formation. We address several aspects of the astrophysics of…S. Dall'Osso, S. N. Shore, L. Stella·Nov 26, 2008SaveLearn
The Evolution of Bar Pattern Speed with Time and Bulge ProminenceResults from the modelling of bars in nearly 300 galaxies are used to test predictions from theoretical work on the evolution of bars. Correlations are found between bar ellipticity and boxiness,…Dimitri A. Gadotti·Nov 26, 2008SaveLearn
A strong optical flare before the rising afterglow of GRB 080129We report on GROND observations of a 40 sec duration (rest-frame) optical flare from GRB 080129 at redshift 4.349. The rise- and decay time follow a power law with indices +12 and -8, respectively,…J. Greiner, T. Krühler, S. McBreen et al.·Nov 26, 2008SaveLearn
Dark Matter in Gas-Rich Dwarf GalaxiesWe investigate the distribution of dark matter (DM) in gas-rich, low-mass galaxies, confronting them with numerical cosmological simulations with cold dark matter (LCDM). We show that the derived…U. Klein, G. Gentile, P. Salucci et al.·Nov 26, 2008SaveLearn
Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxiesWe have calculated variability Doppler boosting factors, Lorentz factors, and viewing angles for a large sample of sources by using total flux density observations at 22 and 37 GHz and VLBI data. We…T. Hovatta, E. Valtaoja, M. Tornikoski et al.·Nov 26, 2008SaveLearn
"Internal Linear Combination" method for the separation of CMB from Galactic foregrounds in the harmonic domainForeground contamination is the fundamental hindrance to the cosmic microwave background (CMB) signals and its separation from it represents a fundamental question in Cosmology. One of the most…R. Vio, P. Andreani·Nov 26, 2008SaveLearn
An anti-correlation between X-ray luminosity and H-alpha equivalent width in X-ray binariesWe report an anticorrelation between continuum luminosity and the equivalent width (EW) of the H-alpha emission line in X-ray binary systems. The effect is evident both in a universal monotonic…R. P. Fender, D. M. Russell, C. Knigge et al.·Nov 26, 2008SaveLearn
Modelling the spectral response of the Swift-XRT CCD camera: Experience learnt from in-flight calibration(Abbreviated) We show that the XRT spectral response calibration was complicated by various energy offsets in photon counting (PC) and windowed timing (WT) modes related to the way the CCD is…O. Godet, A. P. Beardmore, A. F. Abbey et al.·Nov 26, 2008SaveLearn
Supergiant Temperatures and Linear Radii from Near-Infrared InterferometryWe present angular diameters for 42 luminosity class I stars and 32 luminosity class II stars that have been interferometrically determined with the Palomar Testbed Interferometer. Derived values of…G. T. van Belle, M. J. Creech-Eakman, A. Hart·Nov 26, 2008SaveLearn
Emergence of hyperons in failed supernovae: trigger of the black hole formationWe investigate the emergence of strange baryons in the dynamical collapse of a non-rotating massive star to a black hole by the neutrino-radiation hydrodynamical simulations in general relativity. By…K. Sumiyoshi, C. Ishizuka, A. Ohnishi et al.·Nov 26, 2008SaveLearn
Stellar dynamos with Ω× J effectWe study axisymmetric mean-field dynamo models containing differential rotation, the α effect and the additional turbulent induction effects. The additional effects result from the combined action…V. V. Pipin, N. Seehafer·Nov 26, 2008SaveLearn
Signatures of the Milky Way's Dark Disk in Current and Future ExperimentsIn hierarchical structure formation models of disk galaxies, a dark matter disk forms as massive satellites are preferentially dragged into the disk-plane where they dissolve. Here, we quantify the…T. Bruch, J. Read, L. Baudis et al.·Nov 25, 2008SaveLearn
Search for Solar Axions with the CDMS-II ExperimentThe CDMS-II experiment operates 19 germanium detectors with a mass of 250g each in a very low background environment. Originally designed for the search for Dark Matter the experiment can also detect…T. Bruch·Nov 25, 2008SaveLearn
Quasi-blackbody component and radiative efficiency of the prompt emission of gamma-ray burstsWe perform time-resolved spectroscopy on the prompt emission in gamma-ray bursts (GRBs) and identify a thermal, photospheric component peaking at a temperature of a few hundreds keV. This peak does…Felix Ryde, Asaf Pe'er·Nov 25, 2008SaveLearn
The Distance, Mass, and Radius of the Neutron Star in 4U 1608-52Low mass X-ray binaries that show thermonuclear bursts are ideal sources for constraining the equation of state of neutron star matter. The lack of independent distance measurements for most of these…Tolga Guver, Feryal Ozel, Antonio Cabrera-Lavers et al.·Nov 25, 2008SaveLearn
Search for neutrino point sources with IceCube 22-stringsThe IceCube detector took data in its 22-string configuration in 2007-2008. This data has been analyzed to search for extraterrestrial point sources of neutrinos using several methods. Two main…J. L. Bazo Alba·Nov 25, 2008SaveLearn
Does dark matter consist of baryons of new stable family quarks?We investigate the possibility that the dark matter consists of clusters of the heavy family quarks and leptons with zero Yukawa couplings to the lower families. Such a family is predicted by the…G. Bregar, N. S. Mankoc Borstnik·Nov 25, 2008SaveLearn
On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part II: the TrispectrumWe calculate the trispectrum Tζof the primordial curvature perturbation ζ, generated during a slow-roll inflationary epoch by considering a two-field quadratic model of inflation with …Yeinzon Rodriguez, Cesar A. Valenzuela-Toledo·Nov 25, 2008SaveLearn
Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sourcesWithin the framework of our program of assessment of the nature of unidentified or poorly known INTEGRAL sources, we present here spectroscopy of optical objects, selected through positional…N. Masetti, P. Parisi, E. Palazzi et al.·Nov 25, 2008SaveLearn
Rings and spirals in barred galaxies. I Building blocksIn this paper we present building blocks which can explain the formation and properties both of spirals and of inner and outer rings in barred galaxies. We first briefly summarise the main results of…E. Athanassoula, M. Romero-Gomez, J. J. Masdemont·Nov 25, 2008SaveLearn
The Spitzer Infrared Nearby Galaxies Survey: A High-Resolution Spectroscopy AnthologyHigh resolution mid-infrared spectra are presented for 155 nuclear and extranuclear regions from the Spitzer Infrared Nearby Galaxies Survey (SINGS). The fluxes for nine atomic forbidden and three…D. A. Dale, J. D. T. Smith, E. A. Schlawin et al.·Nov 25, 2008SaveLearn
Parameter degeneracies and (un)predictability of gravitational microlensing events(abridged) Some difficulties in determining the physical properties that lead to observed anomalies in microlensing light curves, such as the mass and separation of extra-solar planets orbiting the…M. Dominik·Nov 25, 2008SaveLearn