Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach
Artículo
Open/ Download
Publication date
2013Metadata
Show full item record
Cómo citar
Palanque-Delabrouille, Nathalie
Cómo citar
Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach
Author
- Palanque-Delabrouille, Nathalie;
- Magneville, Ch.;
- Yèche, Ch.;
- Eftekharzadeh, S.;
- Myers, A. D.;
- Petitjean, P.;
- Pâris, I.;
- Aubourg, E.;
- McGreer, I.;
- Fan, X.;
- Dey, A.;
- Schlegel, D.;
- Bailey, S.;
- Bizayev, D.;
- Bolton, A.;
- Dawson, K.;
- Ebelke, G.;
- Ge, J.;
- Malanushenko, E.;
- Malanushenko, V.;
- Oravetz, D.;
- Pan, K.;
- Ross, N. P.;
- Schneider, D. P.;
- Sheldon, E.;
- Simmons, A.;
- Tinker, J.;
- White, M.;
- Willmer, Ch.;
Abstract
We present a measurement of the quasar luminosity function in the range 0.68 < z < 4 down to extinction corrected magnitude
gdered = 22.5, using a simple and well understood target selection technique based on the time-variability of quasars. The completeness
of our sample was derived directly from a control sample of quasars, without requiring complex simulations of quasar light-curves or
colors. A total of 1877 quasar spectra were obtained from dedicated programs on the Sloan telescope (as part of the SDSS-III/BOSS
survey) and on the Multiple Mirror Telescope. They allowed us to derive the quasar luminosity function. It agrees well with results
previously published in the redshift range 0.68 < z < 2.6. Our deeper data allow us to extend the measurement to z = 4. We measured
quasar densities to gdered < 22.5, obtaining 30 QSO per deg2 at z < 1, 99 QSO per deg2 for 1 < z < 2.15, and 47 QSO per deg2 at
z > 2.15. Using pure luminosity evolution models, we fitted our LF measurements and predicted quasar number counts as a function
of redshift and observed magnitude. These predictions are useful inputs for future cosmology surveys such as those relying on the
observation of quasars to measure baryon acoustic oscillations.
General note
Artículo de publicación ISI
Identifier
URI: https://repositorio.uchile.cl/handle/2250/126269
DOI: DOI: 10.1051/0004-6361/201220379
Quote Item
A&A 551, A29 (2013)
Collections