Pith. sign in

REVIEW 1 cited by

Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2509.08057 v2 pith:UJL2OL4G submitted 2025-09-09 astro-ph.CO

Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis

R. Gsponer , S. Ramirez-Solano , F. Rodr\'iguez-Mart\'inez , M. Vargas-Maga\~na , S. Novell-Masot , N. Findlay , H. Gil-Mar\'in , P. Zarrouk
show 60 more authors
S. Nadathur A. Rocher S. Brieden A. P\'erez-Fern\'andez J. Aguilar S. Ahlen D. Bianchi D. Brooks F. J. Castander T. Claybaugh A. Cuceu A. de la Macorra A. de Mattia Arjun Dey P. Doel A. Font-Ribera J. E. Forero-Romero E. Gazta\~naga S. Gontcho A Gontcho G. Gutierrez J. Guy C. Hahn H. K. Herrera-Alcantar K. Honscheid C. Howlett D. Huterer M. Ishak R. Joyce R. Kehoe D. Kirkby T. Kisner A. Kremin O. Lahav C. Lamman M. Landriau L. Le Guillou M. E. Levi C. Magneville M. Manera A. Meisner R. Miquel J. Moustakas E. Mueller N. Palanque-Delabrouille W. J. Percival F. Prada I. P\'erez-R\`afols G. Rossi L. Samushia E. Sanchez D. Schlegel M. Schubnell H. Seo J. Silber D. Sprayberry G. Tarl\'e B. A. Weaver C. Zhao R. Zhou H. Zou
This is my paper
classification astro-ph.CO
keywords cosmologydesidatafiducialmathrmshiftssigmaanalysis
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original abstract

We assess the impact of the fiducial cosmology choice on cosmological inference from full-shape (FS) fits of the galaxy power spectrum in the DESI 2024 Data Release 1 (DR1). Using a suite of AbacusSummit DR1 mock catalogues based on the Planck 2018 best-fit cosmology, we quantify potential systematic shifts introduced by analysing the data under five secondary cosmologies - featuring variations in matter density, thawing dark energy, higher effective number of neutrino species, reduced clustering amplitude, and the DESI DR1 BAO best-fit $w_0w_a$CDM cosmology - relative to DESI's baseline Planck 2018 cosmology. We investigate two complementary FS analysis approaches: full-modelling (FM) and ShapeFit (SF), each with distinct sensitivities to the assumed fiducial model. Across all tracers, we find for FM that systematic shifts induced by fiducial cosmology mismatches remain well below the DESI DR1 statistical uncertainties, with maximum deviations of 0.22$\sigma_\mathrm{DR1}$ in $\Lambda$CDM scenarios and 0.12$\sigma_\mathrm{DR1+SN}$ when including SN Ia mock data in extended $w_0w_a$CDM fits. For SF, the shifts in the compressed parameters remain below $0.45\sigma_\mathrm{DR1}$ for all tracers and cosmologies.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. DESI 2024 V: Full-Shape Galaxy Clustering from Galaxies and Quasars

    astro-ph.CO 2024-11 accept novelty 6.0

    DESI DR1 full-shape galaxy clustering constrains Omega_m = 0.296 ± 0.010, H0 = 68.63 ± 0.79 km/s/Mpc, and sigma_8 = 0.841 ± 0.034, consistent with LambdaCDM and Planck.