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UV Imaging Polarimetry of the peculiar Seyfert 2 galaxy Mrk 477
Makoto Kishimoto, Laura E. Kay, Robert Antonucci +3
We present the results of UV imaging polarimetry of the Seyfert 2 galaxy Mrk 477 taken by the Faint Object Camera onboard the Hubble Space Telescope (HST). From a previous HST UV i…
VLT observations of the z=6.28 quasar SDSS 1030+0524
L. Pentericci, X. Fan, H. W. Rix +9
We present new VLT spectroscopic observations of the most distant quasar known, SDSS J1030+0524 at z=6.28 which was recently discovered by the Sloan Digital Sky Survey. We confirm…
UV Imaging Polarimetry of the Seyfert 2 Galaxy Mrk 3
Makoto Kishimoto, Laura E. Kay, Robert Antonucci +3
We present UV imaging polarimetry data of the Seyfert 2 galaxy Mrk 3 taken by the Hubble Space Telescope. The polarized flux is found to be extended to ~1 kpc from the nucleus, and…
High Resolution Simulations of the Plunging Region in a Pseudo-Newtonian Potential: Dependence on Numerical Resolution and Field Topology
John F. Hawley, Julian H. Krolik
New three dimensional magnetohydrodynamic simulations of accretion disk dynamics in a pseudo-Newtonian Paczynski-Wiita potential are presented. These have finer resolution in the i…
Non-LTE, Relativistic Accretion Disk Fits to 3C~273 and the Origin of the Lyman Limit Spectral Break
Omer Blaes, Ivan Hubeny, Eric Agol +1
We fit general relativistic, geometrically thin accretion disk models with non-LTE atmospheres to near simultaneous multiwavelength data of 3C~273, extending from the optical to th…
Warm Absorbers in AGN: A Multi-Temperature Wind
Julian H. Krolik, Gerard A. Kriss
Although soft X-ray absorption features in AGN were discovered almost ten years ago, the nature and location of the gas creating them has remained controversial. Guided by the resu…
Extreme BAL Quasars from the Sloan Digital Sky Survey
Patrick B. Hall, J. E. Gunn, G. R. Knapp +16
The Sloan Digital Sky Survey has discovered a population of broad absorption line quasars with various extreme properties. Many show absorption from metastable states of FeII with…
X-ray Destruction of Dust Along the Line of Sight to Gamma-Ray Bursts
Andrew S. Fruchter, Julian H. Krolik, James E. Rhoads
We show that if all gamma-ray bursts emit X-rays in a way similar to those observed by BeppoSax, much of the extinction along the line of sight in the host galaxy of the burst can…
Non-LTE Models and Theoretical Spectra of Accretion Disks in Active Galactic Nuclei. IV. Effects of Compton Scattering and Metal Opacities
Ivan Hubeny, Omer Blaes, Julian H. Krolik +1
We extend our models of the vertical structure and emergent radiation field of accretion disks around supermassive black holes described in previous papers of this series. Our mode…
Two-Dimensional Hydrodynamic Simulations of Convection in Radiation-Dominated Accretion Disks
Eric Agol, Julian Krolik, Neal Turner +1
The standard equilibrium for radiation-dominated accretion disks has long been known to be viscously, thermally, and convectively unstable, but the nonlinear development of these i…
Magnetic Stresses at the Inner Edges of Accretion Disks Around Black Holes
Julian H. Krolik
For the past twenty-five years, nearly all analyses of accretion disk dynamics have assumed that stress inside the disk is locally proportional to pressure (the "alpha-model") and…
Monitoring of the optical and 2.5-11.7 micron spectrum and mid-IR imaging of the Seyfert 1 galaxy Mrk279 with ISO
The AGN Watch collaboration, M. Santos-Lleo, J. Clavel +19
Mid-infrared images of the Seyfert 1 galaxy Mrk 279 obtained with the ISO satellite are presented together with the results of a one-year monitoring campaign of the 2.5-11.7 micron…
Broad Absorption Line Quasars in the Sloan Digital Sky Survey with VLA-FIRST Radio Detections
Kristen Menou, Daniel E. Vanden Berk, Zeljko Ivezic +12
We present 13 Broad Absorption Line (BAL) quasars, including 12 new objects, which were identified in the Sloan Digital Sky Survey (SDSS) and matched within 2'' to sources in the F…