HST Morphologies of z~2 Dust Obscured Galaxies I: Power-law SourcesWe present high spatial resolution optical and near-infrared imaging obtained using the ACS, WFPC2 and NICMOS cameras aboard the Hubble Space Telescope of 31 24um--bright z~2 Dust Obscured Galaxies…R. S. Bussmann, Arjun Dey, J. Lotz et al.·Nov 12, 2008SaveLearn
Long period planets from dynamical relaxationRecent imaging campaigns indicate the likely existence of massive planets (~ 1-10 MJ) on ~1000 year orbits about a few percent of stars. Such objects are not easily explained in most current planet…Caleb Scharf, Kristen Menou·Nov 12, 2008SaveLearn
Space-Dependent Step Features: Transient Breakdown of Slow-roll, Homogeneity and Isotropy During InflationA step feature in the inflaton potential can model a transient breakdown of slow-roll inflation. Here we generalize the step feature to include space-dependence, allowing it also to model a breakdown…Rose Lerner, John McDonald·Nov 12, 2008SaveLearn
On the evolution of mean motion resonances through stochastic forcing: Fast and slow libration modes and the origin of HD128311Aims. We clarify the response of extrasolar planetary systems in a 2:1 mean motion commensurability with masses ranging from the super Jovian range to the terrestrial range to stochastic forcing that…Hanno Rein, John C. B. Papaloizou·Nov 12, 2008SaveLearn
Air Shower Measurements with the LOPES Radio Antenna ArrayLOPES is set up at the location of the KASCADE-Grande extensive air shower experiment in Karlsruhe, Germany and aims to measure and investigate radio pulses from Extensive Air Showers. Since radio…A. Haungs·Nov 12, 2008SaveLearn
Black Hole Spins of Radio SourcesA new approach to constraining or determining the spin of a massive black hole is proposed. A key parameter in the analysis is the dimensionless ratio, r, of the energy released to the mass of the…Ruth A. Daly·Nov 12, 2008SaveLearn
Radio Detector Array Simulation - A Full Simulation Chain for an Array of Antenna DetectorsRecently radio signals originating from extensive air showers have been observed at the Pierre Auger Observatory. In this note we present software to simulate the response of an array of antenna…Stefan Fliescher·Nov 12, 2008SaveLearn
3C66B as a TeV radiogalaxyThe MAGIC collaboration reported the detection of a new VHE source, MAGIC J0223+430, located close to the position of the blazar 3C66A, considered a candidate TeV blazar since a long time. A careful…F. Tavecchio, G. Ghisellini·Nov 12, 2008SaveLearn
Dynamics of substructures in warm dark-matter cosmologiesWe performed cosmological simulations based upon both a cold dark matter (CDM) and a warm dark matter (WDM) model. The focus of our investigations lies with selected spatial and kinematic properties…Bastian Arnold, Alexander Knebe, Chris Power et al.·Nov 12, 2008SaveLearn
Active Galactic Nuclei: Sources for ultra high energy cosmic rays?The origin of ultra high energy cosmic rays promises to lead us to a deeper understanding of the structure of matter. This is possible through the study of particle collisions at center-of-mass…P. L. Biermann, J. K. Becker, L. Caramete et al.·Nov 12, 2008SaveLearn
The radius and other fundamental parameters of the F9 V star beta VirginisWe have used the Sydney University Stellar Interferometer (SUSI) to measure the angular diameter of the F9 V star beta Virginis. After correcting for limb darkening and combining with the revised…J. R. North, J. Davis, J. G. Robertson et al.·Nov 12, 2008SaveLearn
Do the nearby BHB stars belong to the Thick Disk or the Halo?We study the Milky Way region Z<3.0 kpc, where the thick disk and inner halo overlap, by using the kinematics of local blue horizontal branch (BHB) stars (within 1 kpc) and new samples of BHB stars…T. D. Kinman, Heather L. Morrison, Warren R. Brown·Nov 12, 2008SaveLearn
Magnetic fields and the location of the PDRI review recent studies of the emission-line regions in Orion and M17. Both have similar geometries, a bubble of hot shocked gas surrounding the central star cluster, with H+, H0, and H2 regions,…Gary J. Ferland·Nov 12, 2008SaveLearn
Structure of Neutron Stars in Tensor-Vector-Scalar TheoryBekenstein's Tensor-Vector-Scalar (TeVeS) theory has had considerable success in explaining various phenomena without the need for dark matter. However, it is difficult to observationally discern…Paul D. Lasky, Hajime Sotani, Dimitrios Giannios·Nov 12, 2008SaveLearn
On the (Non)Evolution of HI Disks over Cosmic TimeWe present new results on the frequency distribution of projected HI column densities f(N,X), total comoving covering fraction, and integrated mass densities rhoHI of high redshift, HI `disks'…J. Xavier Prochaska, Arthur M. Wolfe·Nov 12, 2008SaveLearn
Determining Quasar Black Hole Mass Functions from their Broad Emission Lines: Application to the Bright Quasar SurveyWe describe a Bayesian approach to estimating quasar black hole mass functions (BHMF) when using the broad emission lines to estimate black hole mass. We show how using the broad line mass estimates…Brandon C. Kelly, Marianne Vestergaard, Xiaohui Fan·Nov 12, 2008SaveLearn
Period-Luminosity Relations Derived from the OGLE-III Fundamental Mode CepheidsIn this Paper, we have derived Cepheid period-luminosity (P-L) relations for the Large Magellanic Cloud (LMC) fundamental mode Cepheids, based on the data released from OGLE-III. We have applied an…C. Ngeow, S. Kanbur, H. Neilson et al.·Nov 12, 2008SaveLearn
Empirical Constraints on Trojan Companions and Orbital Eccentricities in 25 Transiting Exoplanetary SystemsWe present a search for Trojan companions to 25 transiting exoplanets. We use the technique of Ford & Gaudi, in which a difference is sought between the observed transit time and the transit time…N. Madhusudhan, Joshua N. Winn·Nov 12, 2008SaveLearn
Clean Kinematic Samples in Dwarf Spheroidals: An Algorithm for Evaluating Membership and Estimating Distribution Parameters When Contamination is Present(abridged) We develop an algorithm for estimating parameters of a distribution sampled with contamination, employing a statistical technique known as ``expectation maximization'' (EM). Given…Matthew G. Walker, Mario Mateo, Edward W. Olszewski et al.·Nov 12, 2008SaveLearn
Dynamical Evolution of AGN Host Galaxies - Gas In/Out-Flow Rates in 7 NUGA GalaxiesTo examine the role of the host galaxy structure in fueling nuclear activity, we estimated gas flow rates from several kpc down to the inner few 10 pc for seven nearby spiral galaxies, selected from…Sebastian Haan, Eva Schinnerer, Eric Emsellem et al.·Nov 12, 2008SaveLearn
Modeling Gamma-Ray Attenuation in High-Redshift GeV SpectraWe present two models for the cosmological UV background light, and calculate the opacity of GeV gamma--rays out to redshift 9. The contributors to the background include 2 possible quasar…Rudy C. Gilmore, Piero Madau, Joel R. Primack et al.·Nov 12, 2008SaveLearn
Fishing in Tidal Streams: New Radial Velocity and Proper Motion Constraints on the Orbit of the Anticenter StreamWe have obtained radial velocity measurements for stars in two, widely-separated fields in the Anticenter Stream. Combined with SDSS/USNO-B proper motions, the new measurements allow us to establish…Carl J. Grillmair, Jeffrey L. Carlin, Steven R. Majewski·Nov 12, 2008SaveLearn
GCRT J1742-3001: A New Radio Transient Towards the Galactic CenterWe report the detection of a new transient radio source, GCRT J1742-3001, located ~1 degree from the Galactic center. The source was detected ten times from late 2006 to 2007 May in our 235 MHz…Scott D. Hyman, Rudy Wijnands, T. Joseph W. Lazio et al.·Nov 12, 2008SaveLearn
New views on bar pattern speeds from the NUGA surveyWe present a review on bar pattern speeds from preliminary results in the context of the Nuclei of Galaxies (NUGA) project. The large variety of molecular circumnuclear morphologies found in NUGA is…V. Casasola, S. Garcia-Burillo, F. Combes et al.·Nov 12, 2008SaveLearn
The accretion regime of LS 5039: 3-D SPH simulationsLS 5039 is a TeV gamma-ray binary with extended radio emission. It consists of a compact object in the mildly eccentric (e=0.35), 3.9-day orbit around a massive O star. The nature of the compact…A. T. Okazaki, G. E. Romero, S. P. Owocki·Nov 12, 2008SaveLearn