학술논문
Validation of the DESI 2024 Ly$\alpha$ forest BAO analysis using synthetic datasets
Document Type
Working Paper
Author
Cuceu, Andrei; Herrera-Alcantar, Hiram K.; Gordon, Calum; Martini, Paul; Guy, Julien; Font-Ribera, Andreu; Gonzalez-Morales, Alma X.; Karim, M. Abdul; Aguilar, J.; Ahlen, S.; Armengaud, E.; Bault, A.; Brooks, D.; Claybaugh, T.; de la Macorra, A.; Doel, P.; Fanning, K.; Ferraro, S.; Forero-Romero, J. E.; Gaztañaga, E.; Gontcho, S. Gontcho A; Gutierrez, G.; Honscheid, K.; Howlett, C.; Karaçaylı, N. G.; Kirkby, D.; Kremin, A.; Landriau, M.; Goff, J. M. Le; Guillou, L. Le; Levi, M. E.; Manera, M.; Meisner, A.; Miquel, R.; Moustakas, J.; Muñoz-Gutiérrez, A.; Myers, A. D.; Niz, G.; Palanque-Delabrouille, N.; Percival, W. J.; Poppett, C.; Prada, F.; Pérez-Ràfols, I.; Ramírez-Pérez, C.; Ravoux, C.; Rezaie, M.; Rossi, G.; Sanchez, E.; Schlegel, D.; Schubnell, M.; Seo, H.; Sprayberry, D.; Tan, T.; Tarlé, G.; Vargas-Magaña, M.; Walther, M.; Weaver, B. A.; Zhou, R.; Zou, H.
Source
Subject
Language
Abstract
The first year of data from the Dark Energy Spectroscopic Instrument (DESI) contains the largest set of Lyman-$\alpha$ (Ly$\alpha$) forest spectra ever observed. This data, collected in the DESI Data Release 1 (DR1) sample, has been used to measure the Baryon Acoustic Oscillation (BAO) feature at redshift $z=2.33$. In this work, we use a set of 150 synthetic realizations of DESI DR1 to validate the DESI 2024 Ly$\alpha$ forest BAO measurement. The synthetic data sets are based on Gaussian random fields using the log-normal approximation. We produce realistic synthetic DESI spectra that include all major contaminants affecting the Ly$\alpha$ forest. The synthetic data sets span a redshift range $1.8