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Improving reconstruction of the baryon acoustic peak: The effect of local environment

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posted on 2024-07-09, 15:35 authored by Ixandra Achitouv, Chris BlakeChris Blake
Precise measurements of the baryon acoustic oscillation (BAO) scale as a standard ruler in the clustering pattern of large-scale structure is a central goal of current and future galaxy surveys. The BAO peak may be sharpened using the technique of density-field reconstruction, in which the bulk displacements of galaxies are estimated using a Zel'dovitch approximation. We use numerical simulations to demonstrate how the accuracy of this approximation depends strongly on local environment, and how this information may be used to construct an improved BAO measurement through environmental reweighting and using higher-order perturbation theory. We outline further applications of the displacement field for testing cosmological models.

Funding

CE110001020:ARC

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ISSN

1550-7998

Journal title

Physical Review D

Volume

92

Issue

8

Article number

article no. 083523

Pagination

11 pp

Publisher

American Physical Society

Copyright statement

Copyright © 2015 American Physical Society. The published version is reproduced in accordance with the copyright policy of the publisher.

Language

eng

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