THE z = 5 QUASAR LUMINOSITY FUNCTION FROM SDSS STRIPE 82

We present a measurement of the Type I quasar luminosity function at z = 5 using a large sample of spectroscopically confirmed quasars selected from optical imaging data. We measure the bright end (M[sub 1450] < -26) with Sloan Digital Sky Survey (SDSS) data covering -6000 deg2, then extend to lo...

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Bibliographic Details
Published in:The Astrophysical journal 2013-05, Vol.768 (2), p.1-25
Main Authors: McGreer, Ian D, Jiang, Linhua, Fan, Xiaohui, Richards, Gordon T, Strauss, Michael A, Ross, Nicholas P, White, Martin, Shen, Yue, Schneider, Donald P, Myers, Adam D, Brandt, W Niel, DeGraf, Colin, Glikman, Eilat, Ge, Jian, Streblyanska, Alina
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BARYONS
COVERINGS
DENSITY
EQUATOR
Equatorial regions
HYDROGEN
Imaging
LIMITING VALUES
LUMINOSITY
Mathematical models
OSCILLATIONS
PHOTONS
QUASARS
RED SHIFT
SKY
Sky surveys (astronomy)
SPECTRA
TELESCOPES
UNIVERSE
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Summary:We present a measurement of the Type I quasar luminosity function at z = 5 using a large sample of spectroscopically confirmed quasars selected from optical imaging data. We measure the bright end (M[sub 1450] < -26) with Sloan Digital Sky Survey (SDSS) data covering -6000 deg2, then extend to lower luminosities (M[sub 1450] < -24) with newly discovered, faint z ~ 5 quasars selected from 235 deg[sup 2] of deep, coadded imaging in the SDSS Stripe 82 region (the celestial equator in the Southern Galactic Cap). Our model for the quasar luminosity function predicts that quasars generate ~30% of the ionizing photons required to keep hydrogen in the universe ionized at z = 5.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/768/2/105