The 2dF-SDSS LRG and QSO survey: the QSO luminosity function at 0.4 <z <2.6

Scott Croom, Gordon Richards, Tom Shanks, Brian Boyle, Michael Strauss, Adam Myers, Robert Nichol, Kevin Pimbblet, Nic Ross, Donald Schneider, Robert Sharp, David Wake

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Abstract

We present the quasi-stellar object (QSO) luminosity function (LF) of the completed 2dF-SDSS LRG and QSO (2SLAQ) survey, based on QSOs photometrically selected from Sloan Digital Sky Survey (SDSS) imaging data and then observed spectroscopically using the 2dF instrument on the Anglo-Australian Telescope. We analyse 10 637 QSOs in the redshift range 0.4 <z <2.6 to a g-band flux limit of 21.85 (extinction-corrected) and an absolute continuum magnitude of Mg(z = 2) <-21.5. This sample covers an area of 191.9 deg 2. The binned QSO LF agrees with that of the brighter SDSS main QSO sample, but extends a??2.5 mag fainter, clearly showing the flattening of the LF towards faint absolute magnitudes. 2SLAQ finds an excess of QSOs compared to the 2dF QSO Redshift Survey at g > 20.0, as found previously by Richards et al.
Original languageEnglish
Pages (from-to)1755 - 1772
Number of pages18
JournalMonthly Notices of the Royal Astronomical Society
Volume399
Issue number4
DOIs
Publication statusPublished - 2009
Externally publishedYes

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