Measuring large-scale structure with quasars in narrow-band filter surveys

L. Raul Abramo, Michael A. Strauss, Marcos Lima, Carlos Hernández-Monteagudo, Ruth Lazkoz, Mariano Moles, Claudia Mendes de Oliveira, Irene Sendra, Laerte Sodré, Thaisa Storchi-Bergmann

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We show that a large-area imaging survey using narrow-band filters could detect quasars in sufficiently high number densities, and with more than sufficient accuracy in their photometric redshifts, to turn them into suitable tracers of large-scale structure. If a narrow-band optical survey can detect objects as faint as i= 23, it could reach volumetric number densities as high as 10-4h3Mpc-3 (comoving) at z~ 1.5. Such a catalogue would lead to precision measurements of the power spectrum up to z~ 3-4. We also show that it is possible to employ quasars to measure baryon acoustic oscillations at high redshifts, where the uncertainties from redshift distortions and non-linearities are much smaller than at z≲ 1. As a concrete example we study the future impact of the Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS), which is a narrow-band imaging survey in the optical over 1/5 of the unobscured sky with 42 filters of ~100-Å full width at half-maximum. We show that J-PAS will be able to take advantage of the broad emission lines of quasars to deliver excellent photometric redshifts, σz≃ 0.002(1 +z), for millions of objects.

Original languageEnglish (US)
Pages (from-to)3251-3267
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
StatePublished - Jul 2012

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Large-scale structure of Universe
  • Quasars: general


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