Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Perturbation theory for modeling galaxy bias: Validation with simulations of the Dark Energy Survey
 
research article

Perturbation theory for modeling galaxy bias: Validation with simulations of the Dark Energy Survey

Pandey, S.
•
Krause, E.
•
Jain, B.
Show more
December 8, 2020
Physical Review D

We describe perturbation theory (PT) models of galaxy bias for applications to photometric galaxy surveys. We model the galaxy-galaxy and galaxy-matter correlation functions in configuration space and validate against measurements from mock catalogs designed for the Dark Energy Survey (DES). We find that an effective PT model with five galaxy bias parameters provides a good description of the 3D correlation functions above scales of 4 Mpc/h and z < 1. Our tests show that at the projected precision of the DES Year 3 analysis, two of the nonlinear bias parameters can be fixed to their coevolution values, and a third (the k(2) term for higher derivative bias) set to zero. The agreement is typically at the 2% level over scales of interest, which is the statistical uncertainty of our simulation measurements. To achieve this level of agreement, our fiducial model requires using the full nonlinear matter power spectrum (rather than the one-loop PT one). We also measure the relationship between the nonlinear and linear bias parameters and compare them to their expected coevolution values. We use these tests to motivate the galaxy bias model and scale cuts for the cosmological analysis of the Dark Energy Survey; our conclusions are generally applicable to all photometric surveys.

  • Details
  • Metrics
Type
research article
DOI
10.1103/PhysRevD.102.123522
Web of Science ID

WOS:000596457400003

Author(s)
Pandey, S.
Krause, E.
Jain, B.
MacCrann, N.
Blazek, J.  
Crocce, M.
DeRose, J.
Fang, X.
Ferrero, I
Friedrich, O.
Show more
Date Issued

2020-12-08

Publisher

American Physical Society

Published in
Physical Review D
Volume

102

Issue

12

Article Number

123522

Subjects

Astronomy & Astrophysics

•

Physics, Particles & Fields

•

Astronomy & Astrophysics

•

Physics

•

survey cosmological implications

•

challenge lightcone simulation

•

halo occupation distribution

•

power spectrum

•

constraints

•

estimators

•

evolution

•

growth

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASTRO  
Available on Infoscience
June 19, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/179429
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés