Recalculating the quasar luminosity function of the extended Baryon Oscillation Spectroscopic Survey
Open Access
- 8 December 2017
- journal article
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 608, A64
- https://doi.org/10.1051/0004-6361/201731850
Abstract
Aims. The extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digital Sky Survey provides a uniform sample of over 13 000 variability selected quasi-stellar objects (QSOs) in the redshift range 0.68 <z< 4.0. The previously published QSO luminosity function (QLF), parametric model fits, and projected number counts based on this survey may be in error because the k-correction has apparently been misapplied, which results in underestimating the intrinsic brightness of roughly half of the eBOSS sources. This work provides new estimates of the QLF based on a corrected eBOSS dataset.Methods. Intrinsic luminosities were recalculated using the appropriate g-band k-correction function. The QLF was determined for the corrected dataset using a model-weighted estimator, and parametric models were refit to the corrected luminosity function. Projected number counts based on the corrected models are also provided. Results. At redshifts higher than the “pivot” redshift, zp = 2.2, the original and recalculated results differ significantly; in particular, the new results show stronger high-redshift evolution in the best-fit models than the original eBOSS analysis. A new seven-parameter QLF model is provided that fits the corrected eBOSS dataset.Keywords
This publication has 9 references indexed in Scilit:
- The extended Baryon Oscillation Spectroscopic Survey: Variability selection and quasar luminosity functionAstronomy & Astrophysics, 2016
- THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: OVERVIEW AND EARLY DATAThe Astronomical Journal, 2016
- THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY: THE QUASAR LUMINOSITY FUNCTION FROM DATA RELEASE NINEThe Astrophysical Journal, 2013
- THEz= 5 QUASAR LUMINOSITY FUNCTION FROM SDSS STRIPE 82The Astrophysical Journal, 2013
- The 2dF–SDSS LRG and QSO survey: the QSO luminosity function at 0.4 < z < 2.6Monthly Notices of the Royal Astronomical Society, 2009
- The Sloan Digital Sky Survey Quasar Survey: Quasar Luminosity Function from Data Release 3The Astronomical Journal, 2006
- The 2dF-SDSS LRG and QSO (2SLAQ) Survey: thez< 2.1 quasar luminosity function from 5645 quasars tog= 21.85Monthly Notices of the Royal Astronomical Society, 2005
- Soft X-ray AGN luminosity function from ROSAT surveysAstronomy & Astrophysics, 2001
- Direct construction of the galaxy luminosity function as a function of redshiftThe Astrophysical Journal, 1993