High-redshift Quasars from the Sloan Digital Sky Survey

Details High-redshift Quasars from the Sloan Digital Sky Survey High-redshift Quasars from the Sloan Digital Sky Survey

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.9804f&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #98.04; Bulletin of the American Astronomical Society, Vol. 31, p.1517

Astronomy and Astrophysics

Astronomy

Scientific paper

We present photometric and spectroscopic observations of more than 80 high-redshift quasars (3.5 < z < 5.03) discovered from 400 deg2 of five-color (u', g', r', i', z') imaging data taken by the Sloan Digital Sky Survey (SDSS) during its commissioning phase. The quasars are selected by their distinctive colors in SDSS multicolor space. This quasar sample is used to study the evolution of the quasar luminosity function at high redshift. We find that the number density of luminous quasars at MB < -26.5 deceases by a factor of 20 from z 2.5 to z 5, in sharp contrast to the non-evolution of star-forming galaxies over a similar redshift range.

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