Validation of the DESI 2024 Lyα forest BAO analysis using synthetic datasets

Andrei Cuceu,Hiram K. Herrera-Alcantar, Calum Gordon,Paul Martini,Julien Guy,Andreu Font-Ribera,Alma X. Gonzalez-Morales, M. Abdul Karim,J. Aguilar,S. Ahlen,E. Armengaud, A. Bault,D. Brooks,T. Claybaugh,A. de la Macorra,P. Doel, K. Fanning,S. Ferraro, J. E. Forero-Romero,E. Gaztañaga,S. Gontcho A Gontcho,G. Gutierrez,K. Honscheid,C. Howlett,N. G. Karaçaylı,D. Kirkby, A. Kremin,M. Landriau,J. M. Le Goff,L. Le Guillou,M. E. Levi,M. Manera,A. Meisner,R. Miquel,J. Moustakas,A. Muñoz-Gutiérrez,A. D. Myers,G. Niz,N. Palanque-Delabrouille,W. J. Percival,C. Poppett,F. Prada,I. Pérez-Ràfols, C. Ramírez-Pérez,C. Ravoux,M. Rezaie,G. Rossi,E. Sanchez,D. Schlegel,M. Schubnell,H. Seo, D. Sprayberry,T. Tan,G. Tarlé,M. Vargas-Magaña,M. Walther,B. A. Weaver, R. Zhou, H. Zou

arxiv（2024）

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摘要

The first year of data from the Dark Energy Spectroscopic Instrument (DESI) contains the largest set of Lyman-α (Lyα) 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 Lyα 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 Lyα forest. The synthetic data sets span a redshift range 1.8更多

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