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X. Fan (Arizona), M. A. Strauss (Princeton), D. P. Schneider (Penn State), R. H. Becker (UC Davis), R. L. White (STScI), V. K. Narayanan, G. T. Richards (Princeton), L. Pentericci, E. Grebel (MPIA), SDSS Collaboration
We present the new results from a survey of i-dropout objects selected from the multicolor imaging data of the Sloan Digital Sky Survey (SDSS). Three new objects, at z=6.4, 6.2 and 6.05, were discovered, bringing the total number of known quasars at z>5.7 to seven. We present new measurements on the evolution of the quasar number density and quasar emission line strengths based on this quasar sample, and discuss the Gunn-Peterson effect along different lines of sight and its implications on the history of cosmic reionization based on observations taken with the Apache Point 3.5-m, Keck, and Hobby-Eberly and Calar Alto 3.5m Telescopes.
The author(s) of this abstract have provided an email address for comments about the abstract: fan@as.arizona.edu
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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.