2.2k citations · 29.3k across the 347 of their papers we have counts for
7 papers · 1 filter
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…
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…
The X-ray -- radio alignment in the z = 2.2 radio galaxy PKS 1138--262
C. L. Carilli, D. E. Harris, L. Pentericci +4
We present high resolution X-ray observations of the narrow line radio galaxy PKS 1138-262 at z = 2.156 with the ACIS-S detector on the Chandra observatory. These observations show…
The population of galaxies in the forming cluster around the radio galaxy MRC 1138-262 at z=2.2
L. Pentericci, J. D. Kurk, H. J. A. Rottgering +2
We have recently discovered a forming cluster around the radio galaxy MRC 1138-262 at redshift 2.2. Besides the population of Ly alpha emitting galaxies that have been confirmed sp…
A search for high redshift clusters associated with radio galaxies at 2 < z < 4
J. D. Kurk, B. P. Venemans, H. J. A. Roettgering +2
High redshift radio galaxies are amongst the most massive galaxies in the early Universe and have properties expected from central galaxies in forming clusters. We are carrying out…
A Survey of z>5.8 Quasars in the Sloan Digital Sky Survey I: Discovery of Three New Quasars and the Spatial Density of Luminous Quasars at z~6
Xiaohui Fan, Vijay K. Narayanan, Robert H. Lupton +10
We present the results from a survey of i-dropout objects selected from ~1550 deg^2 of multicolor imaging data from the Sloan Digital Sky Survey, to search for luminous quasars at…
NICMOS observations of high redshift radio galaxies: witnessing the formation of bright elliptical galaxies?
L. Pentericci, P. J. McCarthy, H. J. A. Röttgering +3
We present the results of a near infrared imaging program of a sample of 19 radio galaxies with redshift between 1.7 and 3.2, using the NICMOS Camera 2 on the Hubble Space Telescop…