Title: The clustering of DESI-like luminous red galaxies using photometric redshifts

Abstract

In this paper, we present measurements of the redshift-dependent clustering of a DESI-like luminous red galaxy (LRG) sample selected from the Legacy Survey imaging dataset, and use the halo occupation distribution (HOD) framework to fit the clustering signal. The photometric LRG sample in this study contains 2.7 million objects over the redshift range of 0.4 < z < 0.9 over 5655 sq. degrees. We have developed new photometric redshift (photo-z) estimates using the Legacy Survey DECam and WISE photometry, with σ_NMAD = 0.02 precision for LRGs. We compute the projected correlation function using new methods that maximize signal-to-noise while incorporating redshift uncertainties. We present a novel algorithm for dividing irregular survey geometries into equal-area patches for jackknife resampling. For a 5-parameter HOD model fit using the MultiDark halo catalog, we find that there is little evolution in HOD parameters except at the highest-redshifts. The inferred large-scale structure bias is largely consistent with constant clustering amplitude over time. In an appendix, we explore limitations of MCMC fitting using stochastic likelihood estimates resulting from applying HOD methods to N-body catalogs, and present a new technique for finding best-fit parameters in this situation. Accompanying this paper we have released the PRLS (Photometric Redshiftsmore » for the Legacy Surveys) catalog of photo-z’s obtained by applying the methods used in this work to the full Legacy Survey Data Release 8 dataset. This catalog provides accurate photometric redshifts for objects with z < 21 over more than 16,000 square degrees of sky.« less

Authors:

Zhou, Rongpu  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-5381-4372"

Newman, Jeffrey A. ^[2]; Mao, Yao-Yuan  ^[3];

• Search DOE PAGES for author "Mao, Yao-Yuan"
• Search DOE PAGES for ORCID "0000-0002-1200-0820"

Meisner, Aaron ^[4]; Moustakas, John ^[5]; Myers, Adam D. ^[6]; Prakash, Abhishek ^[7]; Zentner, Andrew R.  ^[2];

• Search DOE PAGES for author "Zentner, Andrew R."
• Search DOE PAGES for ORCID "0000-0002-6443-7186"

Brooks, David ^[8]; Duan, Yutong  ^[9];

• Search DOE PAGES for author "Duan, Yutong"
• Search DOE PAGES for ORCID "0000-0002-2611-0895"

Landriau, Martin ^[10]; Levi, Michael E. ^[10]; Prada, Francisco ^[11]; Tarle, Gregory ^[12]

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1. Department of Physics and Astronomy, University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, USA, Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), USA, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
2. Department of Physics and Astronomy, University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, USA, Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), USA
3. Department of Physics and Astronomy, University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, USA, Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), USA, Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
4. NSF’s National Optical-Infrared Astronomy Research Laboratory, 950 N. Cherry Avenue, Tucson, AZ 85719, USA
5. Department of Physics and Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, USA
6. Department of Physics & Astronomy, University of Wyoming, 1000 E. University, Dept. 3905, Laramie, WY 82071, USA
7. Infrared Processing and Analysis Center, California Institute of Technology, MC 100-22, Pasadena, CA 91125, USA
8. Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, UK
9. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA, Physics Department, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
10. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
11. Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, s/n, E-18008 Granada, Spain
12. Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA

Publication Date:

Fri Dec 04 00:00:00 EST 2020

Research Org.:

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Wyoming, Laramie, WY (United States)

Sponsoring Org.:

USDOE Office of Science (SC), High Energy Physics (HEP); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)

OSTI Identifier:

1834235

Alternate Identifier(s):

OSTI ID: 1762226; OSTI ID: 1787339

Grant/Contract Number:  

SC0007914; SC0020086; AC02-05CH11231; SC0019022; SC0015628; HST-HF2- 51441.001; NAS5-26555; AST-616414; AST 1516266; AST-1517563; AST-0950945

Resource Type:

Published Article

Journal Name:

Monthly Notices of the Royal Astronomical Society

Additional Journal Information:

Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 501 Journal Issue: 3; Journal ID: ISSN 0035-8711

Publisher:

Oxford University Press

Country of Publication:

United Kingdom

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; galaxies: haloes; galaxies: evolution; large-scale structure of Universe; galaxies: distances and redshifts