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A new test of gravity – II. Application of marked correlation functions to luminous red galaxy samples

Armijo, Joaquin; Baugh, Carlton M; Norberg, Peder; Padilla, Nelson D

A new test of gravity – II. Application of marked correlation functions to luminous red galaxy samples Thumbnail


Authors

Nelson D Padilla



Abstract

We apply the marked correlation function test proposed by Armijo et al. (Paper I) to samples of luminous red galaxies (LRGs) from the final data release of the Sloan Digital Sky Survey (SDSS) III. The test assigns a density-dependent mark to galaxies in the estimation of the projected marked correlation function. Two gravity models are compared: general relativity (GR) and
gravity. We build mock catalogues which, by construction, reproduce the measured galaxy number density and two-point correlation function of the LRG samples, using the halo occupation distribution model (HOD). A range of HOD models give acceptable fits to the observational constraints, and this uncertainty is fed through to the error in the predicted marked correlation functions. The uncertainty from the HOD modelling is comparable to the sample variance for the SDSS-III LRG samples. Our analysis shows that current galaxy catalogues are too small for the test to distinguish a popular
model from GR. However, upcoming surveys with a better measured galaxy number density and smaller errors on the two-point correlation function, or a better understanding of galaxy formation, may allow our method to distinguish between viable gravity models.

Citation

Armijo, J., Baugh, C. M., Norberg, P., & Padilla, N. D. (2024). A new test of gravity – II. Application of marked correlation functions to luminous red galaxy samples. Monthly Notices of the Royal Astronomical Society, 528(4), 6631-6636. https://doi.org/10.1093/mnras/stae449

Journal Article Type Article
Acceptance Date Feb 6, 2024
Online Publication Date Feb 13, 2024
Publication Date 2024-03
Deposit Date Mar 13, 2024
Publicly Available Date Mar 13, 2024
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 528
Issue 4
Pages 6631-6636
DOI https://doi.org/10.1093/mnras/stae449
Keywords Space and Planetary Science; Astronomy and Astrophysics
Public URL https://durham-repository.worktribe.com/output/2327197

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
© 2024 The Author(s).
Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium,
provided the original work is properly cited.






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