Journal Article

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 and Thaisa Storchi-Bergmann

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 423, issue 4, pages 3251-3267
Published in print July 2012 | ISSN: 0035-8711
Published online July 2012 | e-ISSN: 1365-2966 | DOI:
Measuring large-scale structure with quasars in narrow-band filter surveys

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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 10−4 h3 Mpc−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.

Keywords: quasars: general; large-scale structure of Universe

Journal Article.  13576 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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