Q2237+0305 in X-rays: spectra and variability with XMM-NewtonX-ray observations of gravitationally lensed quasars may allow us to probe the inner structure of the central engine of a quasar. Observations of Q2237+0305 (Einstein Cross) in X-rays may be used to…E. V. Fedorova, V. I. Zhdanov, C. Vignali et al.·Sep 12, 2008SaveLearn
Combined Effects of Galaxy Interactions and Large-Scale Environment on Galaxy PropertiesWe inspect the coupled dependence of physical parameters of the SDSS galaxies on the small-scale (distance to and morphology of the nearest neighbor galaxy) and the large-scale (background density…Changbom Park, Yun-Young Choi·Sep 12, 2008SaveLearn
Flares in Gamma Ray Bursts (II)We illustrate some of the preliminary results obtained with a new sample of flares and a new analysis. In these proceedings we deal mainly with the analysis related to the flare energy and describe…G. Chincarini, R. Margutti, J. Mao et al.·Sep 12, 2008SaveLearn
The Case for Hypercritical Accretion in M33 X-7The spin parameter of the black hole in M33 X-7 has recently been measured to be a*=0.77+-0.05 (Liu et al. 2008). It has been proposed that the spin of the 15.65 Msun black hole is natal. We show…E. Moreno Mendez, G. E. Brown, C. -H. Lee et al.·Sep 12, 2008SaveLearn
Ionization Cone in the X-ray Binary LMC X-1In an earlier paper, we presented the first evidence for a bow-shock nebula surrounding the X-ray binary LMC X-1 on a scale of ~15 pc, which we argued was powered by a jet associated with an…R. Cooke, J. Bland-Hawthorn, R. Sharp et al.·Sep 12, 2008SaveLearn
A Correlation of Spectral Lag Evolution with Prompt Optical Emission in GRBs?We report on observations of correlated behavior between the prompt gamma-ray and optical emission from GRB 080319B, which (i) strongly suggest that they occurred within the same astrophysical source…Michael Stamatikos, Tilan N. Ukwatta, Takanori Sakamoto et al.·Sep 12, 2008SaveLearn
Frequency Variation of the Kilohertz Quasi-periodic Oscillations and the Flux of the Band-limited Noise in Scorpius X-1We study the kilohertz quasi-periodic oscillations (kHz QPOs) and the band-limited noise (BLN) in the 0.5--16 Hz range observed simultaneously on the horizontal branch (HB) and on the upper normal…Xiaofeng Cao, Wenfei Yu·Sep 12, 2008SaveLearn
The Observations of Redshift Evolution in Large Scale Environments (ORELSE) Survey : I. The Survey Design and First Results on Cl 0023+0423 at z = 0.84 and RX J1821.6+6827 at z = 0.82We present the Observations of Redshift Evolution in Large Scale Environments (ORELSE) survey, a systematic search for structure on scales greater than 10 Mpc around 20 well-known clusters at 0.6 < z…L. M. Lubin, R. R. Gal, B. C. Lemaux et al.·Sep 11, 2008SaveLearn
Mapping the Dark Side with DEIMOS: Globular Clusters, X-ray Gas, and Dark Matter in the NGC 1407 GroupNGC 1407 is the central elliptical in a nearby evolved galaxy group apparently destined to become a cluster core. We use the kinematics of globular clusters to probe the dynamics and mass profile of…Aaron J. Romanowsky, Jay Strader, Lee R. Spitler et al.·Sep 11, 2008SaveLearn
Acceleration of Galactic Supershells by Lyman Alpha RadiationScattering of Lyman Alpha (hereafter Lya) photons by neutral hydrogen gas in a single outflowing 'supershell' around star forming regions often explains the shape and offset of the observed…Mark Dijkstra, Abraham Loeb·Sep 11, 2008SaveLearn
Atmospheric circulation of hot Jupiters: Coupled radiative-dynamical general circulation model simulations of HD 189733b and HD 209458bWe present global, three-dimensional numerical simulations of HD 189733b and HD 209458b that couple the atmospheric dynamics to a realistic representation of non-gray cloud-free radiative transfer.…Adam P. Showman, Jonathan J. Fortney, Yuan Lian et al.·Sep 11, 2008SaveLearn
Suzaku Observations of Local Ultraluminous Infrared GalaxiesWe report the results from our analysis of Suzaku XIS (0.5-10 keV) and HXD/PIN (15-40 keV) observations of five well-known local ULIRGs: IRAS F05189-2524, IRAS F08572+3915, Mrk 273,…Stacy H. Teng, Sylvain Veilleux, Naohisa Anabuki et al.·Sep 11, 2008SaveLearn
A Multi-Epoch HST Study of the Herbig-Haro Flow from XZ TauriWe present nine epochs of Hubble Space Telescope optical imaging of the bipolar outflow from the pre-main sequence binary XZ Tauri. Our data monitors the system from 1995-2005 and includes emission…John E. Krist, Karl. R. Stapelfeldt, J. Jeff Hester et al.·Sep 11, 2008SaveLearn
Calibration update of the COMBO-17 CDFS catalogueWe present an update to the photometric calibration of the COMBO-17 catalogue on the Extended Chandra Deep Field South, which is now consistent with the GaBoDS and MUSYC catalogues. As a result,…C. Wolf, H. Hildebrandt, E. N. Taylor et al.·Sep 11, 2008SaveLearn
Obscured star formation in intermediate-density environments: A Spitzer study of the Abell 901/902 superclusterWe explore the amount of obscured star-formation as a function of environment in the A901/902 supercluster at z=0.165 in conjunction with a field sample drawn from the A901 and CDFS fields, imaged…A. Gallazzi, E. F. Bell, C. Wolf et al.·Sep 11, 2008SaveLearn
Are fossil groups a challenge of the Cold Dark Matter paradigm?We study six groups and clusters of galaxies suggested in the literature to be `fossil' systems (i.e. to have luminous diffuse X-ray emission and a magnitude gap of at least 2 mag-R between the…Stefano Zibetti, Daniele Pierini, Gabriel W. Pratt·Sep 11, 2008SaveLearn
The Imperial IRAS-FSC Redshift Catalogue (IIFSCz)We present a new catalogue, the Imperial IRAS-FSC Redshift Catalogue (IIFSCz), of 60,303 galaxies selected at 60 micron from the IRAS Faint Source Catalogue (FSC). The IIFSCz consists of accurate…Lingyu Wang, Michael Rowan-Robinson·Sep 11, 2008SaveLearn
Dark Matter Gravitational Clustering With a Long-Range Scalar InteractionWe explore the possibility of improving the ΛCDM model at megaparsec scales by introducing a scalar interaction which increases the mutual gravitational attraction of dark matter particles. Using…Wojciech A. Hellwing, Roman Juszkiewicz·Sep 11, 2008SaveLearn
Mass Distribution, Rotation Curves and Gravity TheoriesComparison of mass density profiles of galaxies of varying sizes based on some gravity theories from observed galaxy rotation curves and assessing the need for dark matter. We present an analysis…Rahul Datta, Dilip G. Banhatti·Sep 11, 2008SaveLearn
Modification of the 21-cm power spectrum by X-rays during the epoch of reionisationWe incorporate a contribution to reionization from X-rays within analytic and semi-numerical simulations of the 21-cm signal arising from neutral hydrogen during the epoch of reionization. We explore…Lila Warszawski, Paul M. Geil, Stuart Wyithe·Sep 11, 2008SaveLearn
European VLBI Network observations of 6.7-GHz methanol masers in a candidate circumstellar discThe first high-resolution (5 mas) VLBI observations of 6.7-GHz methanol masers in DR21(OH)N, a candidate circumstellar disc around a very young massive star, are presented. Previous observations of…Lisa Harvey-Smith, Rebeca Soria-Ruiz·Sep 11, 2008SaveLearn
Gravitational Radiation from Primordial Helical Inverse Cascade MHD TurbulenceWe consider the generation of gravitational waves by primordial helical inverse cascade magnetohydrodynamic (MHD) turbulence produced by bubble collisions at the electroweak phase transition. We…Tina Kahniashvili, Leonardo Campanelli, Grigol Gogoberidze et al.·Sep 11, 2008SaveLearn
Near-Infrared spectral diagnostics for unresolved stellar population galaxiesWe want to develop spectral diagnostics of stellar populations in the near-infrared (NIR), for unresolved stellar populations. We created a semi-empirical population model and we compare the model…M. Cesetti, V. D. Ivanov, L. Morelli·Sep 11, 2008SaveLearn
COSMOS Photometric Redshifts with 30-bands for 2-deg2We present accurate photometric redshifts in the 2-deg2 COSMOS field. The redshifts are computed with 30 broad, intermediate, and narrow bands covering the UV (GALEX), Visible-NIR (Subaru, CFHT,…O. Ilbert, P. Capak, M. Salvato et al.·Sep 11, 2008SaveLearn
Photometric redshift and classification for the XMM-COSMOS sourcesWe present photometric redshifts and spectral energy distribution (SED) classifications for a sample of 1542 optically identified sources detected with XMM in the COSMOS field. Our template fitting…M. Salvato, G. Hasinger, O. Ilbert et al.·Sep 11, 2008SaveLearn