Dr Pauline Zarrouk pauline.s.zarrouk@durham.ac.uk
Academic Visitor
Baryon acoustic oscillations in the projected cross-correlation function between the eBOSS DR16 quasars and photometric galaxies from the DESI Legacy Imaging Surveys
Zarrouk, Pauline; Rezaie, Mehdi; Raichoor, Anand; Ross, Ashley J; Alam, Shadab; Blum, Robert; Brookes, David; Chuang, Chia-Hsun; Cole, Shaun; Dawson, Kyle S; Eisenstein, Daniel J; Kehoe, Robert; Landriau, Martin; Moustakas, John; Myers, Adam D; Norberg, Peder; Percival, Will J; Prada, Francisco; Schubnell, Michael; Seo, Hee-Jong; Tarlé, Gregory; Zhao, Cheng
Authors
Mehdi Rezaie
Anand Raichoor
Ashley J Ross
Shadab Alam
Robert Blum
David Brookes
Chia-Hsun Chuang
Professor Shaun Cole shaun.cole@durham.ac.uk
Director of the Institute for Computational Cosmology
Kyle S Dawson
Daniel J Eisenstein
Robert Kehoe
Martin Landriau
John Moustakas
Adam D Myers
Professor Peder Norberg peder.norberg@durham.ac.uk
Professor
Will J Percival
Francisco Prada
Michael Schubnell
Hee-Jong Seo
Gregory Tarlé
Cheng Zhao
Abstract
We search for the baryon acoustic oscillations in the projected cross-correlation function binned into transverse comoving radius between the SDSS-IV DR16 eBOSS quasars and a dense photometric sample of galaxies selected from the DESI Legacy Imaging Surveys. We estimate the density of the photometric sample of galaxies in this redshift range to be about 2900 deg−2, which is deeper than the official DESI emission line galaxy selection, and the density of the spectroscopic sample is about 20 deg−2. In order to mitigate the systematics related to the use of different imaging surveys close to the detection limit, we use a neural network approach that accounts for complex dependences between the imaging attributes and the observed galaxy density. We find that we are limited by the depth of the imaging surveys that affects the density and purity of the photometric sample and its overlap in redshift with the quasar sample, which thus affects the performance of the method. When cross-correlating the photometric galaxies with quasars in the range 0.6 ≤ z ≤ 1.2, the cross-correlation function can provide better constraints on the comoving angular distance DM (6 per cent precision) compared to the constraint on the spherically averaged distance DV (9 per cent precision) obtained from the autocorrelation. Although not yet competitive, this technique will benefit from the arrival of deeper photometric data from upcoming surveys that will enable it to go beyond the current limitations we have identified in this work.
Citation
Zarrouk, P., Rezaie, M., Raichoor, A., Ross, A. J., Alam, S., Blum, R., …Zhao, C. (2021). Baryon acoustic oscillations in the projected cross-correlation function between the eBOSS DR16 quasars and photometric galaxies from the DESI Legacy Imaging Surveys. Monthly Notices of the Royal Astronomical Society, 503(2), 2562-2582. https://doi.org/10.1093/mnras/stab298
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 21, 2021 |
Online Publication Date | Feb 9, 2021 |
Publication Date | 2021-05 |
Deposit Date | Apr 21, 2021 |
Publicly Available Date | Apr 21, 2021 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 503 |
Issue | 2 |
Pages | 2562-2582 |
DOI | https://doi.org/10.1093/mnras/stab298 |
Public URL | https://durham-repository.worktribe.com/output/1244073 |
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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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