Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach

N. Palanque-Delabrouille, Ch Magneville, Ch Yèche, S. Eftekharzadeh, A. D. Myers, P. Petitjean, I. Pâris, E. Aubourg, I. McGreer, Xiaohui Fan, A. Dey, D. Schlegel, S. Bailey, D. Bizayev, A. Bolton, K. Dawson, G. Ebelke, J. Ge, E. Malanushenko, V. MalanushenkoD. Oravetz, K. Pan, N. P. Ross, D. P. Schneider, E. Sheldon, A. Simmons, J. Tinker, M. White, Ch Willmer

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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 deg 2 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.

Original languageEnglish (US)
Article numberA29
JournalAstronomy and Astrophysics
Volume551
DOIs
StatePublished - 2013

Fingerprint

quasars
luminosity
cosmology
acoustics
oscillation
baryons
prediction
oscillations
predictions

Keywords

  • Dark energy
  • Quasars: general
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Palanque-Delabrouille, N., Magneville, C., Yèche, C., Eftekharzadeh, S., Myers, A. D., Petitjean, P., ... Willmer, C. (2013). Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach. Astronomy and Astrophysics, 551, [A29]. https://doi.org/10.1051/0004-6361/201220379

Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach. / Palanque-Delabrouille, N.; Magneville, Ch; Yèche, Ch; Eftekharzadeh, S.; Myers, A. D.; Petitjean, P.; Pâris, I.; Aubourg, E.; McGreer, I.; Fan, Xiaohui; 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.

In: Astronomy and Astrophysics, Vol. 551, A29, 2013.

Research output: Contribution to journalArticle

Palanque-Delabrouille, N, Magneville, C, Yèche, C, Eftekharzadeh, S, Myers, AD, 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, NP, Schneider, DP, Sheldon, E, Simmons, A, Tinker, J, White, M & Willmer, C 2013, 'Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach', Astronomy and Astrophysics, vol. 551, A29. https://doi.org/10.1051/0004-6361/201220379
Palanque-Delabrouille, N. ; Magneville, Ch ; Yèche, Ch ; Eftekharzadeh, S. ; Myers, A. D. ; Petitjean, P. ; Pâris, I. ; Aubourg, E. ; McGreer, I. ; Fan, Xiaohui ; 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. / Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach. In: Astronomy and Astrophysics. 2013 ; Vol. 551.
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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 deg 2 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.",
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T1 - Luminosity function from dedicated SDSS-III and MMT data of quasars in 0.7 < z < 4.0 selected with a new approach

AU - Palanque-Delabrouille, N.

AU - Magneville, Ch

AU - Yèche, Ch

AU - Eftekharzadeh, S.

AU - Myers, A. D.

AU - Petitjean, P.

AU - Pâris, I.

AU - Aubourg, E.

AU - McGreer, I.

AU - Fan, Xiaohui

AU - Dey, A.

AU - Schlegel, D.

AU - Bailey, S.

AU - Bizayev, D.

AU - Bolton, A.

AU - Dawson, K.

AU - Ebelke, G.

AU - Ge, J.

AU - Malanushenko, E.

AU - Malanushenko, V.

AU - Oravetz, D.

AU - Pan, K.

AU - Ross, N. P.

AU - Schneider, D. P.

AU - Sheldon, E.

AU - Simmons, A.

AU - Tinker, J.

AU - White, M.

AU - Willmer, Ch

PY - 2013

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