Showing 2005Show all

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astro-ph2005★ 13 cited

EXIST: All-Sky Hard X-ray Imaging and Spectral-Temporal Survey for Black Holes

Jonathan E. Grindlay

The Energetic X-ray Imaging Survey Telescope (EXIST) is under study for the proposed Black Hole Finder Probe, one of the three Einstein Probe missions in NASA's proposed Beyond Ein…

astro-ph2005★ 152 cited

Short gamma-ray bursts from binary neutron star mergers in globular clusters

Jonathan Grindlay, Simon Portegies Zwart, Stephen McMillan

The first locations of short gamma-ray bursts (GRBs) in elliptical galaxies suggest they are produced by the mergers of double neutron star (DNS) binaries in old stellar population…

astro-ph2005★ 182 cited

Chandra and XMM-Newton Observations of a Sample of Low-Redshift FRI and FRII Radio-Galaxy Nuclei

D. A. Evans, D. M. Worrall, M. J. Hardcastle +2

We present spectral results, from Chandra and XMM-Newton observations, of a sample of 22 low-redshift (z < 0.1) radio galaxies, and consider whether the core emission originates fr…

astro-ph2005★ 59 cited

Multiwavelength Observations of the Blazar Mrk 421 in December 2002 and January 2003

P. Rebillot, M. Aller, H. Aller +5

We report on a multiwavelength campaign on the TeV gamma-ray blazar Markarian (Mrk) 421 performed during December 2002 and January 2003. These target of opportunity observations we…

physics.atom-ph2005★ 1 cited

Experimental Investigation of the Dark Pseudoresonance on the D1 Line of the 87Rb Atom Excited by a Linearly Polarized Field

Sergei Zibrov, V. L. Velichansky, A. S. Zibrov +2

The measurements of the metrological characteristics (amplitude, width, and shift in the magnetic field) of the dark pseudoresonance, which was proposed by Kazakov et al. [quant-ph…

astro-ph2005★ 132 cited

Phase-Space Distributions of Chemical Abundances in Milky Way-type Galaxy Halos

Andreea S. Font, Kathryn V. Johnston, James S. Bullock +1

[Abridged] Motivated by upcoming data from astrometric and spectroscopic surveys of the Galaxy, we explore the chemical abundance properties and phase-space distributions in hierar…

astro-ph2005★ 257 cited

A size of ~1 AU for the radio source Sgr A* at the centre of the Milky Way

Zhi-Qiang Shen, K. Y. Lo, M. -C. Liang +2

Although it is widely accepted that most galaxies have supermassive black holes (SMBHs) at their centers^{1-3}, concrete proof has proved elusive. Sagittarius A* (Sgr A*)^4, an ext…

astro-ph2005★ 21 cited

The double AGN in NGC 6240 revealed through 3-5 micron spectroscopy

G. Risaliti, E. Sani, R. Maiolino +7

We present 3-5 micron spectroscopy of the interacting system NGC 6240, showing the presence of two active galactic nuclei. The brightest (southern) nucleus shows up with a starburs…

astro-ph2005★ 31 cited

Chemical Composition of the Planet-Harboring Star TrES-1

A. Sozzetti, D. Yong, B. W. Carney +3

We present a detailed chemical abundance analysis of the parent star of the transiting extrasolar planet TrES-1. Based on high-resolution Keck/HIRES and HET/HRS spectra, we have de…

astro-ph2005★ 14 cited

Evidence of the FIP effect in the coronae of late-type giants

D. Garcia-Alvarez, J. J. Drake, B. Ball +2

Cet, 31 Com and Vel represent the main stages through which late-type giants evolve during their lifetime (the Hertzsprung gap (31 Com), the rapid braking zone ( Vel) an…

astro-ph2005★ 130 cited

A 70 kpc X-ray tail in the cluster A3627

M. Sun, C. Jones, W. Forman +3

We present the discovery of a 70 kpc X-ray tail behind the small late-type galaxy ESO137-001 in the nearby, hot (T=6.5 keV) merging cluster A3627, from both Chandra and XMM observa…

astro-ph2005★ 62 cited

A Keplerian Disk around the Herbig Ae star HD169142

A. Raman, M. Lisanti, D. J. Wilner +2

We present Submillimeter Array observations of the Herbig Ae star HD169142 in 1.3 millimeter continuum emission and 12CO J=2-1 line emission at 1.5 arcsecond resolution that reveal…

astro-ph2005★ 330 cited

The Fundamental Scaling Relations of Elliptical Galaxies

B. Robertson, T. J. Cox, L. Hernquist +4

(ABRIDGED) We examine the fundamental scaling relations of elliptical galaxies formed through mergers. Using hundreds of simulations to judge the impact of progenitor galaxy proper…

astro-ph2005★ 105 cited

Measuring Stellar Velocity Dispersions in Active Galaxies

Jenny E. Greene, Luis C. Ho

(ABRIDGED) We present stellar velocity dispersion (sigma*) measurements for a significant sample of 40 broad-line (Type 1) active galaxies for use in testing the well-known relatio…

astro-ph2005★ 212 cited

The M-sigma Relation in Local Active Galaxies

Jenny E. Greene, Luis C. Ho

We examine whether active galaxies obey the same relation between black hole mass and stellar velocity dispersion as inactive systems, using the largest published sample of velocit…

astro-ph2005★ 86 cited

Extragalactic H_2O masers and X-ray absorbing column densities

J. S. Zhang, C. Henkel, M. Kadler +4

Having conducted a search for the 22 GHz water vapor line towards galaxies with nuclear activity, large nuclear column densities or high infrared luminosities, we present H_2O spec…

astro-ph2005★ 93 cited

Enhanced small-scale Faraday rotation in the Galactic spiral arms

M. Haverkorn, B. M. Gaensler, J. C. Brown +4

We present an analysis of the rotation measures (RMs) of polarized extragalactic point sources in the Southern Galactic Plane Survey. This work demonstrates that the statistics of…

astro-ph2005★ 67 cited

Have We Detected Patchy Reionization in Quasar Spectra?

Adam Lidz, S. Peng Oh, Steven R. Furlanetto

The Lyman-alpha forest at z >~ 5.5 shows strong scatter in the mean transmission even when smoothed over very large spatial scales, >~ 50 Mpc/h. This has been interpreted as a sign…

astro-ph2005★ 318 cited

Primitive Variable Solvers for Conservative General Relativistic Magnetohydrodynamics

Scott C. Noble, Charles F. Gammie, Jonathan C. McKinney +1

Conservative numerical schemes for general relativistic magnetohydrodynamics (GRMHD) require a method for transforming between ``conserved'' variables such as momentum and energy d…

astro-ph2005★ 8 cited

Lyman-alpha forest-CMB cross-correlation and the search for the ionized baryons at high redshift

Rupert A. C. Croft, A. J. Banday, Lars Hernquist

The intergalactic neutral hydrogen which is responsible for the Lyman alpha forest of quasar absorption is a tracer of much larger amounts of ionised hydrogen. The ionised componen…

astro-ph2005★ 65 cited

Discovery of the X-ray Counterpart to the Rotating Radio Transient J1819--1458

S. P. Reynolds, K. J. Borkowski, B. M. Gaensler +10

We present the discovery of the first X-ray counterpart to a Rotating RAdio Transient (RRAT) source. RRAT J1819--1458 is a relatively highly magnetized (B G)…

astro-ph2005★ 15 cited

An investigation of the submillimeter background radiation using SCUBA and Spitzer

S. Dye, S. A. Eales, M. L. N. Ashby +8

We investigate the redshift dependence of the contribution to the extragalactic far-infrared/sub-millimeter background from galaxies detected by the Spitzer Space Telescope at 8um…

astro-ph2005★ 74 cited

The Chandra XBootes Survey - III: Optical and Near-IR Counterparts

Kate Brand, Michael J. I. Brown, Arjun Dey +14

The XBootes Survey is a 5-ks Chandra survey of the Bootes Field of the NOAO Deep Wide-Field Survey (NDWFS). This survey is unique in that it is the largest (9.3 deg^2), contiguous…

astro-ph2005★ 269 cited

Early Evolution of Stellar Groups and Clusters: Environmental Effects on Forming Planetary Systems

Fred C. Adams, Eva M. Proszkow, Marco Fatuzzo +1

This paper studies the dynamical evolution of young stellar clusters with = 100 - 1000 members. We use N-body simulations to explore how evolution depends on system size an…