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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