Model- and calibration-independent test of cosmic accelerationWe present a calibration-independent test of the accelerated expansion of the universe using supernova type Ia data. The test is also model-independent in the sense that no assumptions about the…Marina Seikel, Dominik J. Schwarz·Oct 24, 2008SaveLearn
Results from Seven Years of AMANDA-IIAMANDA is a first-generation high energy neutrino telescope, which has taken data at the South Pole in its final configuration since 2000. Results from seven years of operation are presented here,…Tyce DeYoung·Oct 24, 2008SaveLearn
Simultaneous polarization monitoring of supernovae SN2008D/XT080109 and SN2007uy: isolating geometry from dustThe possible existence of a continuum encompassing the diversity of explosive stellar deaths,ranging from ordinary SNe to relativistic hypernovae associated with long duration GRBs, is under intense…J. Gorosabel, A. de Ugarte Postigo, A. J. Castro-Tirado et al.·Oct 24, 2008SaveLearn
Laboratory investigations of the interaction between benzene and bare silicate grain surfacesExperimental results on the thermal desorption of benzene (C6H6) from amorphous silica (SiO2) are presented. The amorphous SiO2 substrate was imaged using atomic force microscopy (AFM), revealing a…J. D. Thrower, M. P. Collings, F. J. M. Rutten et al.·Oct 24, 2008SaveLearn
Optical phenomena in brany Kerr spacetimesWe study the influence of the tidal charge parameter of the braneworld models onto some optical phenomena in rotating black hole spacetimes. The escape photon cones are determined for special…Jan Schee, Zdenek Stuchlik·Oct 24, 2008SaveLearn
Crinkles in the last scattering surface: Non-Gaussianity from inhomogeneous recombinationThe perturbations in the electron number density during recombination contributes to the Cosmic Microwave Background bispectrum through second order terms. Perturbations in the electron density can…Rishi Khatri, Benjamin D. Wandelt·Oct 24, 2008SaveLearn
Stellar spectropolarimetry with HiVIS: Herbig Ae/Be stars, circumstellar environments and optical pumpingThe polarization of light across spectral lines contains information about the circumstellar material on small spatial scales. Many models relate the circumstellar environment to observable…D. M. Harrington·Oct 24, 2008SaveLearn
Epsilon Eridani's Planetary Debris Disk: Structure and Dynamics based on Spitzer and CSO ObservationsSpitzer and Caltech Submillimeter Observatory (CSO) images and spectrophotometry of epsilon Eridani at wavelengths from 3.5 to 350 um reveal new details of its bright debris disk. The 350 um map…D. Backman, M. Marengo, K. Stapelfeldt et al.·Oct 24, 2008SaveLearn
Non-thermal Electrons at the Earth's Bow Shock: A `Gradual' EventEarth's bow shock is known to produce non-thermal electrons which are generally observed as a `spike' in their flux profile. Here, in this paper, we present an analysis of electron and…M. Oka, T. Terasawa, M. Fujimoto et al.·Oct 24, 2008SaveLearn
On the Age of the Widest Very Low Mass BinaryWe have recently identified the widest very low-mass binary (2M0126AB), consisting of an M6.5V and an M8V dwarf with a separation of ~5100 AU, which is twice as large as that of the second widest…Etienne Artigau, David Lafreniere, Loic Albert et al.·Oct 24, 2008SaveLearn
Report of IAU Commission 30 on Radial Velocities (2006-2009)Brief summaries are given on the following subjects: Radial velocities and exoplanets (Toward Earth-mass planets; Retired A stars and their planets; Current status and prospects); Toward higher…G. Torres, E. V. Glushkova, J. A. Johnson et al.·Oct 24, 2008SaveLearn
Towards Real-time Classification of Astronomical TransientsExploration of time domain is now a vibrant area of research in astronomy, driven by the advent of digital synoptic sky surveys. While panoramic surveys can detect variable or transient events,…A. Mahabal, S. G. Djorgovski, R. Williams et al.·Oct 24, 2008SaveLearn
Detecting the Cosmic Dipole Anisotropy in Large-Scale Radio SurveysThe detection of a dipole anisotropy in the sky distribution of sources in large-scale radio surveys can be used to constrain the magnitude and direction of our local motion with respect to an…Fronefield Crawford·Oct 24, 2008SaveLearn
Detection of the 13CO(J=6-5) Transition in the Starburst Galaxy NGC 253We report the detection of 13CO(J=6-5) emission from the nucleus of the starburst galaxy NGC 253 with the redshift (z) and Early Universe Spectrometer (ZEUS), a new submillimeter grating…S. Hailey-Dunsheath, T. Nikola, G. J. Stacey et al.·Oct 24, 2008SaveLearn
The TeV emitter structure in LS 5039LS 5039 is an X-ray binary detected at very high energies. Along the orbit, there is a significant detection even during the superior conjunction of the compact object, when very large gamma-ray…Valenti Bosch-Ramon, Dmitry Khangulyan, Felix Aharonian·Oct 24, 2008SaveLearn
The synchrotron boiler and the spectral states of black hole binariesWe study the effects of synchrotron self-absorption on the Comptonising electron distribution in the magnetised corona of accreting black holes. We solve the kinetic equations assuming that power is…Julien Malzac, Renaud Belmont·Oct 24, 2008SaveLearn
The low-mass Initial Mass Function in the young cluster NGC 6611NGC 6611 is the massive young cluster (2-3 Myr) that ionises the Eagle Nebula. We present very deep photometric observations of the central region of NGC 6611 obtained with the Hubble Space Telescope…J. M. Oliveira, R. D. Jeffries, J. Th. van Loon·Oct 24, 2008SaveLearn
The nature of LS 5039 under the scrutiny of gamma-raysSeveral gamma-ray binaries have been recently detected by the High-Energy Stereoscopy Array (H.E.S.S.) and the Major Atmospheric Imaging Cerenkov (MAGIC) telescope. In two cases, their nature is…Diego F. Torres, Agnieszka Sierpowska-Bartosik·Oct 24, 2008SaveLearn
Gamma rays from compact binary systemSome of the very high energy (VHE) gamma-ray sources detected with the modern generation of Cherenkov telescopes have been identified with previously known X-ray binary systems. These detections…Josep M. Paredes·Oct 24, 2008SaveLearn
Broad Absorption Line Quasar catalogues with Supervised Neural NetworksWe have applied a Learning Vector Quantization (LVQ) algorithm to SDSS DR5 quasar spectra in order to create a large catalogue of broad absorption line quasars (BALQSOs). We first discuss the…Simone Scaringi, Christopher E. Cottis, Christian Knigge et al.·Oct 24, 2008SaveLearn
Morpho-Kinematic Properties of the 21-Micron Source IRAS 07134+1005We report the results of a Submillimeter Array (SMA) interferometric observation of 21-micron source IRAS 07134+1005 in the CO J=3-2 line. In order to determine the morpho-kinematic properties of the…Jun-ichi Nakashima, Nico Koning, Sun Kwok et al.·Oct 24, 2008SaveLearn
Breaking the AMSP mould: the increasingly strange case of HETE J1900.1-2455We present ongoing Rossi X-ray Timing Explorer (RXTE) monitoring observations of the 377.3 Hz accretion-powered pulsar, HETE J1900.1-2455 Activity continues in this system more than 3 years after…Duncan K. Galloway, Edward H. Morgan, Deepto Chakrabarty·Oct 24, 2008SaveLearn
Two types of softening detected in X-ray afterglows of Swift bursts: internal and external shock origins?The softening process observed in the steep decay phase of early X-ray afterglows of Swift bursts has remained a puzzle since its discovery. The softening process can also be observed in the later…Y. -P. Qin, A. C. Gupta, J. H. Fan et al.·Oct 24, 2008SaveLearn
The three dimensional dynamic structure of the inner Orion NebulaThe three dimensional structure of the brightest part of the Orion Nebula is assessed in the light of published and new data. We find that the widely accepted model of a concave blister of ionized…C. R. O'Dell, W. J. Henney, N. P. Abel et al.·Oct 24, 2008SaveLearn
Welcome back, Polaris the CepheidFor about 100 years the amplitude of the 4-day pulsation in Polaris has decreased. We present new results showing a significant increase in the amplitude based on 4.5 years of continuous monitoring…H. Bruntt, A. J. Penny, D. Stello et al.·Oct 24, 2008SaveLearn