Optimal Reconstruction of Baryon Acoustic Oscillations for DESI 2024
Abstract
Baryon acoustic oscillations (BAO) provide a robust standard ruler to measure the expansion history of the Universe through galaxy clustering. Density-field reconstruction is now a widely adopted procedure for increasing the precision and accuracy of the BAO detection. With the goal of finding the optimal reconstruction settings to be used in the DESI 2024 galaxy BAO analysis, we assess the sensitivity of the post-reconstruction BAO constraints to different choices in our analysis configuration, performing tests on blinded data from the first year of DESI observations (DR1), as well as on mocks that mimic the expected clustering and selection properties of the DESI DR1 target samples. Overall, we find that BAO constraints remain robust against multiple aspects in the reconstruction process, including the choice of smoothing scale, treatment of redshift-space distortions, fiber assignment incompleteness, and parameterizations of the BAO model. We also present a series of tests that DESI followed in order to assess the maturity of the end-to-end galaxy BAO pipeline before the unblinding of the large-scale structure catalogs.
Keywords
Cite
@article{arxiv.2404.03005,
title = {Optimal Reconstruction of Baryon Acoustic Oscillations for DESI 2024},
author = {E. Paillas and Z. Ding and X. Chen and H. Seo and N. Padmanabhan and A. de Mattia and A. J. Ross and S. Nadathur and C. Howlett and J. Aguilar and S. Ahlen and O. Alves and U. Andrade and D. Brooks and E. Buckley-Geer and E. Burtin and S. Chen and T. Claybaugh and S. Cole and K. Dawson and A. de la Macorra and Arjun Dey and P. Doel and K. Fanning and S. Ferraro and J. E. Forero-Romero and C. Garcia-Quintero and E. Gaztañaga and H. Gil-Marín and S. Gontcho A Gontcho and G. Gutierrez and C. Hahn and M. M. S Hanif and K. Honscheid and M. Ishak and R. Kehoe and A. Kremin and M. Landriau and L. Le Guillou and M. E. Levi and M. Manera and P. Martini and L. Medina-Varela and A. Meisner and J. Mena-Fernández and R. Miquel and J. Moustakas and E. Mueller and A. Muñoz-Gutiérrez and A. D. Myers and J. A. Newman and J. Nie and G. Niz and N. Palanque-Delabrouille and W. J. Percival and C. Poppett and F. Prada and A. Pérez-Fernández and M. Rashkovetskyi and M. Rezaie and A. Rosado-Marin and G. Rossi and R. Ruggeri and E. Sanchez and C. Saulder and E. F. Schlafly and D. Schlegel and M. Schubnell and D. Sprayberry and G. Tarlé and D. Valcin and M. Vargas-Magaña and J. Yu and S. Yuan and R. Zhou and H. Zou},
journal= {arXiv preprint arXiv:2404.03005},
year = {2025}
}
Comments
Supporting publication of DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars