The Lopsidedness of Present-Day Galaxies: Connections to the Formation of Stars, the Chemical Evolution of Galaxies, and the Growth of Black HolesWe have used the Sloan Digital Sky Survey (SDSS) to undertake an investigation of lopsidedness in a sample of ~25,000 nearby galaxies (z < 0.06). We use the m=1 azimuthal Fourier mode between the 50%…Timothy A. Reichard, Timothy M. Heckman, Gregory Rudnick et al.·Sep 19, 2008SaveLearn
Gravitational waves from resolvable massive black hole binary systems and observations with Pulsar Timing ArraysMassive black holes are key components of the assembly and evolution of cosmic structures and a number of surveys are currently on-going or planned to probe the demographics of these objects and to…A. Sesana, A. Vecchio, M. Volonteri·Sep 19, 2008SaveLearn
The growth of matter perturbations in f(R) modelsWe consider the linear growth of matter perturbations on low redshifts in some f(R) dark energy (DE) models. We discuss the definition of dark energy (DE) in these models and show the differences…R. Gannouji, B. Moraes, D. Polarski·Sep 19, 2008SaveLearn
Restless quiescence: thermonuclear flashes between transient X-ray outburstsFor thermonuclear flashes to occur on neutron-star surfaces, fuel must have been accreted from a donor star. However, sometimes flashes are seen from transient binary systems when they are thought to…E. Kuulkers, J. J. M. in 't Zand, J. -P. Lasota·Sep 19, 2008SaveLearn
Large-scale structure formation in cosmology with classical and tachyonic scalar fieldsThe evolution of scalar perturbations is studied for 2-component (non-relativistic matter and dark energy) cosmological models at the linear and non-linear stages. The dark energy is assumed to be…O. Sergijenko, Yu. Kulinich, B. Novosyadlyj et al.·Sep 19, 2008SaveLearn
Suzaku Observations of M82 X-1 : Detection of a Curved Hard X-ray SpectrumA report is presented on Suzaku observations of the ultra-luminous X-ray source X-1 in the starburst galaxy M82, made three time in 2005 October for an exposure of ~ 30 ks each. The XIS signals from…Ryohei Miyawaki, Kazuo Makishima, Shinya Yamada et al.·Sep 19, 2008SaveLearn
CN Neutrinos and the Sun's Primordial Core MetalicityI discuss the use of neutrinos from the CN cycle and pp chain to constrain the primordial solar core abundances of C and N at an interesting level of precision. A comparison of the Sun's deep…W. C. Haxton·Sep 19, 2008SaveLearn
Hyperon bulk viscosity in strong magnetic fieldsWe study the bulk viscosity of neutron star matter including Λ hyperons in the presence of quantizing magnetic fields. Relaxation time and bulk viscosity due to both the non-leptonic weak process…Monika Sinha, Debades Bandyopadhyay·Sep 19, 2008SaveLearn
Development of a large area gas photomultiplier with GEM/μPICWe are developing a new photon detector with micro pattern gaseous detectors. A semitransparent CsI photocathode is combined with 10cm×10cm GEM/μPIC for the first prototype which is aimed…H. Sekiya·Sep 19, 2008SaveLearn
Rings of Dark Matter in Collisions Between Clusters of GalaxiesSeveral lines of evidence suggest that the galaxy cluster Cl0024+17, an apparently relaxed system, is actually a collision of two clusters, the interaction occurring along our line of sight. Recent…J. A. ZuHone, D. Q. Lamb, P. M. Ricker·Sep 19, 2008SaveLearn
Chemistry in Disks. II. -- Poor molecular content of the AB Aur diskWe study the molecular content and chemistry of a circumstellar disk surrounding the Herbig Ae star AB Aur at (sub-)millimeter wavelengths. Our aim is to reconstruct the chemical history and…Katharina Schreyer, Stéphane Guilloteau, Dmitry Semenov et al.·Sep 19, 2008SaveLearn
Preheating after Multi-field InflationIn this note I study preheating after multi-field inflation to assess the feasibility of parametric resonance. An intuitive argument for the suppression of resonances due to dephasing of fields in…Diana Battefeld·Sep 19, 2008SaveLearn
Mean motion resonances from planet-planet scatteringPlanet-planet scattering is the leading mechanism to explain the large eccentricities of the observed exoplanet population. However, scattering has not been considered important to the production of…Sean N. Raymond, Rory Barnes, Philip J. Armitage et al.·Sep 19, 2008SaveLearn
MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physicsWe present further development and the first public release of our multimodal nested sampling algorithm, called MultiNest. This Bayesian inference tool calculates the evidence, with an associated…F. Feroz, M. P. Hobson, M. Bridges·Sep 19, 2008SaveLearn
Methods for detecting flaring structures in Sagittarius A* with high frequency VLBIThe super massive black hole candidate, Sagittarius A*, exhibits variability from radio to X-ray wavelengths on time scales that correspond to < 10 Schwarzschild radii. We survey the potential of…Sheperd S. Doeleman, Vincent L. Fish, Avery E. Broderick et al.·Sep 19, 2008SaveLearn
Photometry using the Infrared Array Camera on the Spitzer Space TelescopeWe present several corrections for point source photometry to be applied to data from the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. These corrections are necessary because of…Joseph L. Hora, Sean Carey, Jason Surace et al.·Sep 19, 2008SaveLearn
The impact of Early Dark Energy on non-linear structure formationWe study non-linear structure formation in high-resolution simulations of Early Dark Energy (EDE) cosmologies and compare their evolution with the standard LCDM model. Extensions of the spherical…Margherita Grossi, Volker Springel·Sep 19, 2008SaveLearn
Constraining the nature of galaxy haloes with gravitational mesolensing of QSOs by halo substructure objectsGravitational lensing of background compact objects like active galactic nuclei and quasars, by extended intermediate mass lenses such as globular clusters and and dark matter clumps with masses 105…Yu. L. Bukhmastova, Yu. V. Baryshev·Sep 19, 2008SaveLearn
Termination of star formation by BH feedback in equal- and unequal-mass mergers of disk and elliptical galaxiesWe present binary galaxy merger simulations of gas-rich disks (Sp-Sp), of early-type galaxies and disks (E-Sp, mixed mergers), and mergers of early-type galaxies (E-E, dry mergers) with varying mass…Peter H. Johansson, Thorsten Naab, Andreas Burkert·Sep 19, 2008SaveLearn
Starbursts and torus evolution in AGNRecent VLT SINFONI observations of the close environments (~30pc) of nearby AGNs have shown that thick gas tori and starbursts with ages between 10 and 150Myr are frequently found. By applying these…B. Vollmer, T. Beckert, R. Davies·Sep 19, 2008SaveLearn
NICEST, a near-infrared color excess method tailored for small-scale structuresObservational data and theoretical calculations show that significant small-scale substructures are present in dark molecular clouds. These inhomogeneities can provide precious hints on the physical…Marco Lombardi·Sep 19, 2008SaveLearn
Periodic Pattern in the Residual-Velocity Field of OB AssociationsAn analysis of the residual-velocity field of OB associations within 3 kpc of the Sun has revealed periodic variations in the radial residual velocities along the Galactic radius vector with a…A. M. Mel'nik, A. K. Dambis, A. S. Rastorguev·Sep 19, 2008SaveLearn
The Lagoon Nebula and its VicinityThe Lagoon Nebula is an HII region in the Sagittarius Arm, about 1.3 kpc away, associated with the young (1-3 Myr) open cluster NGC 6530, which contains several O stars and several dozen B stars.…N. F. H. Tothill, Marc Gagné, B. Stecklum et al.·Sep 19, 2008SaveLearn
Finding rare objects and building pure samples: Probabilistic quasar classification from low resolution Gaia spectraWe develop and demonstrate a probabilistic method for classifying rare objects in surveys with the particular goal of building very pure samples. It works by modifying the output probabilities from a…C. A. L. Bailer-Jones, K. W. Smith, C. Tiede et al.·Sep 19, 2008SaveLearn
Timing the accretion flow around accreting millisecond pulsarsAt present, ten years after they were first discovered, ten accreting millisecond pulsars are known. I present a study of the aperiodic X-ray variability in three of these systems, which led to the…Manuel Linares·Sep 19, 2008SaveLearn