An extreme EXO: a type 2 QSO at z=1.87We aim to understand the multi-wavelength properties of 2XMM J123204+215255, the source with the most extreme X-ray-to-optical flux ratio amongst a sample of bright X-ray selected EXOs drawn from a…A. Del Moro, M. G. Watson, S. Mateos et al.·Oct 2, 2008SaveLearn
A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidatesUsing images from the Spitzer GLIMPSE Legacy survey, we have identified more than 300 extended 4.5 micron sources (abbreviated EGO, Extended Green Object, for the common coding of the [4.5] band as…C. J. Cyganowski, B. A. Whitney, E. Holden et al.·Oct 2, 2008SaveLearn
Clustering of Dust-Obscured Galaxies at z ~ 2We present the angular autocorrelation function of 2603 dust-obscured galaxies (DOGs) in the Bootes field of the NOAO Deep Wide-Field Survey. DOGs are red, obscured galaxies, defined as having R-[24]…Mark Brodwin, Arjun Dey, Michael J. I. Brown et al.·Oct 2, 2008SaveLearn
Jet Formation in MHD SimulationsIn this talk I review the current status of jet formation in direct numerical simulations of black-hole accretion disks and magnetospheres. I address the following critical questions: What…P. Chris Fragile·Oct 2, 2008SaveLearn
Gamma Ray Burst Section of the White Paper on the Status and Future of Ground-based TeV Gamma-ray AstronomyThis is a report on the findings of the gamma ray burst working group for the white paper on the status and future of TeV gamma-ray astronomy. The white paper is an APS commissioned document, and the…A. D. Falcone, D. A. Williams, M. G. Baring et al.·Oct 2, 2008SaveLearn
Modelling the Global Solar Corona III: Origin of the Hemispheric Pattern of FilamentsWe consider the physical origin of the hemispheric pattern of filament chirality on the Sun. Our 3D simulations of the coronal field evolution over a period of 6 months, based on photospheric…A. R. Yeates, D. H. Mackay·Oct 2, 2008SaveLearn
Detection of blueshifted emission and absorption and a relativistic Iron line in the X-ray spectrum of ESO 323-G077We report on the X-ray observation of the Seyfert 1 ESO323-G077 performed with XMM-Newton. The spectra show a complex spectrum with conspicuous absorption and emission features. The continuum…E. Jimenez-Bailon, Y. Krongold, S. Bianchi et al.·Oct 2, 2008SaveLearn
Stellar wobble caused by a binary system: Can it really be mistaken as an extra-solar planet?The traditional method for detecting extra-solar planets relies on measuring a small stellar wobble which is assumed to be caused by a planet orbiting the star. Recently, it was suggested that a…Maria H. M. Morais, Alexandre C. M. Correia·Oct 2, 2008SaveLearn
Phase-space structures I: A comparison of 6D density estimatorsThis paper reviews and analyses methods used to identify neighbours in 6D space and estimate the corresponding phase-space density. It compares SPH methods to 6D Delaunay tessellation on statical and…M. Maciejewski, S. Colombi, C. Alard et al.·Oct 2, 2008SaveLearn
Further Constraints on Thermal Quiescent X-ray Emission from SAX J1808.4-3658We observed SAX J1808.4-3658 (1808), the first accreting millisecond pulsar, in deep quiescence with XMM-Newton and (near-simultaneously) Gemini-South. The X-ray spectrum of 1808 is similar to that…C. O. Heinke, P. G. Jonker, R. Wijnands et al.·Oct 2, 2008SaveLearn
Cosmological simulations of the Santa Barbara cluster: the influence of scalar fieldsWe present numerical N-body simulation studies of large-scale structure formation. The main purpose of these studies is to analyze the several models of dark matter and the role they played in the…M. A. Rodriguez-Meza·Oct 2, 2008SaveLearn
Optical Observations of SAX J1808.4-3658 During QuiescenceWe observed the accreting millisecond pulsar SAX J1808.4-3658 with Gemini-South in g' and i' bands, nearly simultaneous with XMM-Newton observations. A clear periodic flux modulation on the…C. J. Deloye, C. O. Heinke, R. E. Taam et al.·Oct 2, 2008SaveLearn
On the Fractal Distribution of HII Regions in Disk GalaxiesIn this work we quantify the degree to which star-forming events are clumped. We apply a precise and accurate technique to calculate the correlation dimension Dc of the distribution of HII regions in…Nestor Sanchez, Emilio J. Alfaro·Oct 2, 2008SaveLearn
Status of the VERITAS ObservatoryVERITAS, an Imaging Atmospheric Cherenkov Telescope (IACT) system for gammma-ray astronomy in the GeV-TeV range, has recently completed its first season of observations with a full array of four…J. Holder, V. A. Acciari, E. Aliu et al.·Oct 2, 2008SaveLearn
Star formation in M33: multiwavelength signatures across the diskAims. We use different tracers, such as Ha, ultraviolet (UV), and infrared (IR) emissions at various wavelengths, to study the dust and star-formation (SF) conditions throughout the disk of M33.…S. Verley, E. Corbelli, C. Giovanardi et al.·Oct 2, 2008SaveLearn
Molecules in the disk orbiting the twin young suns of V4046 SgrWe report the results of a mm-wave molecular line survey of the nearby (D ~ 70 pc), 12 Myr-old system V4046 Sgr -- a tight (9 Rsun separation), short-period (2.42 day) binary with nearly equal…Joel H. Kastner, B. Zuckerman, Pierre Hily-Blant et al.·Oct 2, 2008SaveLearn
Improved analysis of SN1987A antineutrino eventsWe propose a new parameterization of the antineutrino flux from core collapse supernovae, that allows an interpretation of its astrophysical parameters within the Bethe and Wilson scenario for the…G. Pagliaroli, F. Vissani, M. L. Costantini et al.·Oct 2, 2008SaveLearn
Average Fe K-alpha emission from distant AGNOne of the most important parameters in the XRB (X-ray background) synthesis models is the average efficiency of accretion onto SMBH (super-massive black holes). This can be inferred from the shape…A. Corral, M. J. Page, F. J. Carrera et al.·Oct 2, 2008SaveLearn
Features of Kamiokande-II, IMB and Baksan observations and their interpretation in a two-component model for the signalWe consider the time, angular and energy distributions of SN1987A events discussing the quality of their agreement with the expectations. A global interpretation is performed considering a simple…Giulia Pagliaroli, Francesco Vissani·Oct 2, 2008SaveLearn
A near-IR variability study of the Galactic black hole: a red noise source with no detected periodicityWe present the results of near-infrared (2 and 3 microns) monitoring of Sgr A*-IR with 1 min time sampling using the natural and laser guide star adaptive optics (LGS AO) system at the Keck II…Tuan Do, Andrea M. Ghez, Mark R. Morris et al.·Oct 2, 2008SaveLearn
The Status and future of ground-based TeV gamma-ray astronomy. A White Paper prepared for the Division of Astrophysics of the American Physical SocietyIn recent years, ground-based TeV gamma-ray observatories have made spectacular discoveries including imaging spectroscopy observations of galactic sources of different classes, and the discovery of…J. Buckley, K. Byrum, B. Dingus et al.·Oct 2, 2008SaveLearn
The Heliosphere in TimeBecause of the dynamic nature of the interstellar medium, the Sun should have encountered a variety of different interstellar environments in its lifetime. As the solar wind interacts with the…H. -R. Müller, P. C. Frisch, B. D. Fields et al.·Oct 2, 2008SaveLearn
Variations in the dip properties of the low-mass X-ray binary XB 1254-69 observed with XMM-Newton and INTEGRALWe have analysed data from five XMM-Newton observations of XB 1254-69, one of them simultaneous with INTEGRAL, to investigate the mechanism responsible for the highly variable dips durations and…M. Diaz Trigo, A. N. Parmar, L. Boirin et al.·Oct 2, 2008SaveLearn
Deep MERLIN 5GHz Radio Imaging of Supernova Remnants in the M82 StarburstThe results of an extremely deep, 8-day long observation of the central kpc of the nearby starburst galaxy M82 using MERLIN (Multi-Element Radio Linked Interferometer Network) at 5 GHz are presented.…D. M. Fenech, T. W. B. Muxlow, R. J. Beswick et al.·Oct 2, 2008SaveLearn
Cryogenic Composite Detectors for the Dark Matter Experiments CRESST and EURECAWeakly Interacting Massive Particles (WIMPs) are candidates for non-baryonic Dark Matter. WIMPs are supposed to interact with baryonic matter via scattering off nuclei producing a nuclear recoil with…S. Roth, C. Ciemniak, C. Coppi et al.·Oct 2, 2008SaveLearn