Correlated Variability in BlazarsBlazars are thought to emit highly-collimated outflows, so-called jets. By their close alignment to our line of sight, relativistic beaming effects enable us to observe these jets over the whole…Robert Wagner·Aug 19, 2008SaveLearn
Ionizing Photon Escape Fractions from High Redshift Dwarf GalaxiesIt has been argued that low-luminosity dwarf galaxies are the dominant source of ionizing radiation during cosmological reionization. The fraction of ionizing radiation that escapes into the…John H. Wise, Renyue Cen·Aug 18, 2008SaveLearn
Environmental Dependence of Dark Matter Halo Growth I: Halo Merger RatesIn an earlier paper we quantified the mean merger rate of dark matter haloes as a function of redshift z, descendant halo mass M0, and progenitor halo mass ratio xi using the Millennium simulation of…Onsi Fakhouri, Chung-Pei Ma·Aug 18, 2008SaveLearn
The Exceptionally Luminous Type II-L SN 2008esWe report on our early photometric and spectroscopic observations of the extremely luminous Type II supernova (SN) 2008es. With an observed peak optical magnitude of mV = 17.8 and at a redshift z =…A. A. Miller, R. Chornock, D. A. Perley et al.·Aug 18, 2008SaveLearn
Extremely red stellar objects revealed by IPHASWe present photometric analysis and follow-up spectroscopy for a population of extremely red stellar objects extracted from the point-source catalogue of the INT Photometric H-Alpha Survey (IPHAS) of…N. J. Wright, R. Greimel, M. J. Barlow et al.·Aug 18, 2008SaveLearn
A Markov Chain Monte Carlo for Galactic Cosmic Ray physics: I. Method and results for the Leaky Box ModelPropagation of charged cosmic-rays in the Galaxy depends on the transport parameters, whose number can be large depending on the propagation model under scrutiny. A standard approach for determining…A. Putze, L. Derome, D. Maurin et al.·Aug 18, 2008SaveLearn
The Infrared Luminosity of Galaxy ClustersThe aim of this study is to quantify the infrared luminosity of clusters as a function of redshift and compare this with the X-ray luminosity. This can potentially constrain the origin of the…Martin Giard, Ludovic Montier, Etienne Pointecouteau et al.·Aug 18, 2008SaveLearn
Reconstructing the Cosmic Expansion History up to Redshift z=6.29 with the Calibrated Gamma-Ray BurstsRecently, Gamma-Ray Bursts (GRBs) were proposed to be a complementary cosmological probe to type Ia supernovae (SNIa). GRBs have been advocated to be standard candles since several empirical GRB…Hao Wei, Shuang Nan Zhang·Aug 18, 2008SaveLearn
The Nature of a Cosmic-Ray Accelerator, CTB37 B, Observed with Suzaku and ChandraWe report on Suzaku and Chandra observations of the young supernova remnant CTB37B, from which TeV gamma-rays were detected by the H.E.S.S. Cherenkov telescope. The 80 ks Suzaku observation provided…Ryoko Nakamura, Aya Bamba, Manabu Ishida et al.·Aug 18, 2008SaveLearn
The 21cm Power Spectrum After ReionizationWe discuss the 21cm power spectrum (PS) following the completion of reionization. In contrast to the reionization era, this PS is proportional to the PS of mass density fluctuations, with only a…Stuart Wyithe, Abraham Loeb·Aug 18, 2008SaveLearn
Heavy element abundances in giant stars of the globular clusters M4 and M5We present a comprehensive abundance analysis of 27 heavy elements in bright giant stars of the globular clusters M4 and M5 based on high resolution, high signal-to-noise ratio spectra obtained with…David Yong, Amanda I. Karakas, David L. Lambert et al.·Aug 18, 2008SaveLearn
Faranoff-Riley type I jet deceleration at density discontinuities "Relativistic hydrodynamics with realistic equation of state"The deceleration mechanisms for relativistic jets in active galactic nuclei remain an open question, and in this paper we propose a model which could explain sudden jet deceleration, invoking density…Z. Meliani, R. Keppens, B. Giacomazzo·Aug 18, 2008SaveLearn
Chemical Analysis of Five Red Giants in the Globular Cluster M10 (NGC 6254)We have determined Al, α, Fe-peak, and neutron capture elemental abundances for five red giant branch (RGB) stars in the Galactic globular cluster M10. Abundances were determined using equivalent…Sharina Haynes, Geoffrey Burks, Christian I. Johnson et al.·Aug 18, 2008SaveLearn
Measurements of CaII absorption, metals, and dust in a sample of z~1 DLAs and subDLAsWe present observations of CaII, ZnII, and CrII absorption lines in 16 DLAs and 6 subDLAs at 0.6 < z < 1.3, obtained for the dual purposes of: (i) clarifying the relationship between DLAs and…Daniel Nestor, Max Pettini, Paul Hewett et al.·Aug 18, 2008SaveLearn
Energy conditions bounds and supernovae dataThe energy conditions play an important role in the description of some important properties of the Universe, including the current accelerating expansion phase and the possible recent phase of…M. P. Lima, S. D. P. Vitenti, M. J. Reboucas·Aug 18, 2008SaveLearn
Discovery of VHE gamma-rays from RGB J0152+017The BL Lac object RGB J0152+017 (z = 0.080) was predicted to be a very high-energy (VHE; > 100 GeV) gamma-ray source, due to its high X-ray and radio fluxes. We report recent observations of this…J. -P. Lenain, D. Nedbal, M. Raue et al.·Aug 18, 2008SaveLearn
Spitzer Observations of the z=2.73 Lensed Lyman Break Galaxy, MS1512-cB58We present Spitzer infrared (IR) photometry and spectroscopy of the lensed Lyman break galaxy (LBG), MS1512-cB58 at z=2.73. The large (factor ~30) magnification allows for the most detailed infrared…Brian Siana, Harry I. Teplitz, Ranga-Ram Chary et al.·Aug 18, 2008SaveLearn
A Study of H2 Emission in Three Bipolar Proto-Planetary Nebulae: IRAS 16594-4656, Hen 3-401, and Rob 22We have carried out a spatial-kinematical study of three proto-planetary nebulae, IRAS 16594-4656, Hen 3-401, and Rob 22. High-resolution H2 images were obtained with NICMOS on the HST and…Bruce J. Hrivnak, Nathan Smith, Kate Y. L. Su et al.·Aug 18, 2008SaveLearn
The construction of non-spherical models of quasi-relaxed stellar systemsSpherical models of collisionless but quasi-relaxed stellar systems have long been studied as a natural framework for the description of globular clusters. Here we consider the construction of…G. Bertin, A. L. Varri·Aug 18, 2008SaveLearn
Properties of X-ray selected Broad Absorption Line QuasarsBroad absorption line quasars (commonly termed BALQSOs) contain the most dramatic examples of AGN-driven winds. The high absorbing columns in these winds, ~1024 cm-2, ensure that BALQSOs are…A. J. Blustin, T. Dwelly, M. J. Page et al.·Aug 18, 2008SaveLearn
Detecting Sound-Wave-Like Surface Brightness Ripples in Cluster CoresWe investigate the observational requirements for the detection of sound-wave-like features in galaxy cluster cores. We calculate the effect of projection on the observed wave amplitude, and find…J. Graham, A. C. Fabian, J. S. Sanders·Aug 18, 2008SaveLearn
Phase Shift Sequences for an Adding InterferometerCosmic microwave background (CMB) polarimetry has the potential to provide revolutionary advances in cosmology. Future experiments to detect the very weak B mode signal in CMB polarization maps will…Peter Hyland, Brent Follin, Emory F. Bunn·Aug 18, 2008SaveLearn
Star formation rates in Lyman break galaxies: radio stacking of LBGs in the COSMOS field and the sub-μJy radio source populationWe present an analysis of the radio properties of large samples of Lyman Break Galaxies (LBGs) at z 3, 4, and 5 from the COSMOS field. The median stacking analysis yields a statistical…C. L. Carilli, Nicholas Lee, P. Capak et al.·Aug 18, 2008SaveLearn
TW Hydrae: evidence of stellar spots instead of a Hot JupiterTW Hydrae shows significant radial-velocity variations in the optical regime. They have been attributed to a 10 Jupiter Mass planet orbiting the star at 0.04 AU. In this work, we have tested whether…N. Huelamo, P. Figueira, X. Bonfils et al.·Aug 18, 2008SaveLearn
On the nature of unabsorbed Seyfert 2 galaxiesWe present an analysis of six 12 um selected Seyfert 2 galaxies that have been reported to be unabsorbed in the X-ray. By comparing the luminosities of these galaxies in the mid-IR (12um), optical…Murray Brightman, Kirpal Nandra·Aug 18, 2008SaveLearn