activity
19962019
most citedA Survey of z>5.7 Quasars in the Sloan Digital Sky Survey II: Discovery of Three Additional Quasars at z>6

776 citations · 9.1k across the 85 of their papers we have counts for

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Showing 2001 · astro-phShow all

6 papers · 2 filters

astro-ph2001★ 528 cited

Evolution of the Ionizing Background and the Epoch of Reionization from the Spectra of z~6 Quasars

Xiaohui Fan, Vijay K. Narayanan, Michael A. Strauss +4

We study the process of cosmic reionization and estimate the ionizing background in the IGM using the Lyman series absorption in the spectra of the four quasars at 5.7<z<6.3 discov…

astro-ph2001★ 2 cited

The Optical, Infrared and Radio Properties of Extragalactic Sources Observed by SDSS, 2MASS and FIRST Surveys

Z. Ivezic, R. H. Becker, M. Blanton +19

We positionally match sources observed by the Sloan Digital Sky Survey (SDSS), the Two Micron All Sky Survey (2MASS), and the Faint Images of the Radio Sky at Twenty-cm (FIRST) sur…

astro-ph2001

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…

astro-ph2001★ 186 cited

The radio-luminosity - black hole mass correlation for quasars from the FIRST Bright Quasar Survey, and a ``unification scheme'' for radio-loud and radio-quiet quasars

M. Lacy, S. A. Laurent-Muehleisen, S. E. Ridgway +2

Several independent lines of evidence now point to a correlation between black hole mass, M_bh, and radio-luminosity. In this paper we discuss the correlation for quasars from the…

astro-ph2001★ 65 cited

The Environments of a Complete, Moderate-Redshift Sample of FIRST Bent-Double Radio Sources

E. L. Blanton, M. D. Gregg, D. J. Helfand +2

We present an optical spectroscopic and imaging study of the environments of a complete sample of moderate-redshift, bent-double radio sources. More than half of the forty radio ga…

astro-ph2001★ 21 cited

Quasar Absorption Lines as a Function of Quasar Orientation Measures

Gordon T. Richards, S. A. Laurent-Muehleisen, Robert H. Becker +1

We present high resolution radio data at 3.5 and 20 cm from the VLA in the A configuration for 144 quasars with known CIV absorption line properties. Using these measurements, we c…