DESI DR2 results. I. Baryon acoustic oscillations from the Lyman alpha forest

Karim, M. Abdul; Aguilar, J.; Ahlen, S.; Prieto, C. Allende; Alves, O.; Anand, A.; Andrade, U.; Armengaud, E.; Aviles, A.; Bailey, S.; Bault, A.; Behera, J.; BenZvi, S.; Bianchi, D.; Blake, C.; Brodzeller, A.; Brooks, D.; Buckley-Geer, E.; Burtin, E.; Calderon, R.; Canning, R.; Rosell, A. Carnero; Carrilho, P.; Casas, L.; Castander, F. J.; Cereskaite, R.; Charles, M.; Chaussidon, E.; Chaves-Montero, J.; Chebat, D.; Claybaugh, T.; Cole, S.; Cooper, A. P.; Cuceu, A.; Dawson, K. S.; Belsunce, R. de; Macorra, A. de la; Mattia, A. de; Deiosso, N.; Costa, J. Della; Dey, A.; Dey, B.; Ding, Z.; Doel, P.; Edelstein, J.; Eisenstein, D. J.; Elbers, W.; Fagrelius, P.; Fanning, K.; Ferraro, S.; Font-Ribera, A.; Forero-Romero, J. E.; Garcia-Quintero, C.; Garrison, L. H.; Gaztañaga, E.; Gil-Marín, H.; Gontcho, S. Gontcho A.; Gonzalez-Morales, A. X.; Gordon, C.; Green, D.; Gutierrez, G.; Guy, J.; Hahn, C.; Herbold, M.; Herrera-Alcantar, H. K.; Ho, M.; Ho, M.-F.; Honscheid, K.; Howlett, C.; Huterer, D.; Ishak, M.; Juneau, S.; Karaçayl𝚤, N. G.; Kehoe, R.; Kent, S.; Kirkby, D.; Kisner, T.; Kitaura, F.-S.; Koposov, S. E.; Kremin, A.; Lahav, O.; Lamman, C.; Landriau, M.; Lang, D.; Lasker, J.; Goff, J. M. Le; Guillou, L. Le; Leauthaud, A.; Levi, M. E.; Li, Q.; Li, T. S.; Lodha, K.; Lokken, M.; Magneville, C.; Manera, M.; Martini, P.; Matthewson, W. L.; McDonald, P.; Meisner, A.; Mena-Fernández, J.; Miquel, R.; Moustakas, J.; Muñoz-Gutiérrez, A.; Muñoz-Santos, D.; Myers, A. D.; Newman, J. A.; Niz, G.; Noriega, H. E.; Paillas, E.; Palanque-Delabrouille, N.; Pan, J.; Percival, W. J.; Pérez-Ràfols, I.; Pieri, M. M.; Poppett, C.; Prada, F.; Rabinowitz, D.; Raichoor, A.; Ramírez-Pérez, C.; Rashkovetskyi, M.; Ravoux, C.; Rich, J.; Rockosi, C.; Ross, A. J.; Rossi, G.; Ruhlmann-Kleider, V.; Sanchez, E.; Sanders, N.; Satyavolu, S.; Schlegel, D.; Schubnell, M.; Seo, H.; Shafieloo, A.; Sharples, R.; Silber, J.; Sinigaglia, F.; Sprayberry, D.; Tan, T.; Tarlé, G.; Taylor, P.; Turner, W.; Valdes, F.; Vargas-Magaña, M.; Walther, M.; Weaver, B. A.; Wolfson, M.; Yèche, C.; Zarrouk, P.; Zhou, R.; Zou, H.

doi:10.1103/2wwn-xjm5

articlePhysical review. D/Physical review. D.Jun 24, 2025HYBRID OA

DESI DR2 results. I. Baryon acoustic oscillations from the Lyman alpha forest

MAM. Abdul KarimJAJ. AguilarSAS. AhlenCAC. Allende PrietoOAO. Alves

Université Paris-Saclay · Lawrence Berkeley National Laboratory · +67 more institutions

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Abstract

We present the baryon acoustic oscillation (BAO) measurements with the Lyman-α (Lyα) forest from the second data release (DR2) of the Dark Energy Spectroscopic Instrument (DESI) survey. Our BAO measurements include both the autocorrelation of the Lyα forest absorption observed in the spectra of high-redshift quasars and the cross-correlation of the absorption with the quasar positions. The total sample size is approximately a factor of 2 larger than the DR1 dataset, with forest measurements in over 820,000 quasar spectra and the positions of over 1.2 million quasars. We describe several significant improvements to our analysis in this paper, and two supporting papers describe improvements to the synthetic…

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150

MA
M. Abdul KarimCorresponding
Université Paris-Saclay
JA
J. Aguilar
Lawrence Berkeley National Laboratory
SA
S. Ahlen
CA
C. Allende Prieto
Universidad de La Laguna, Instituto de Astrofísica de Canarias
OA
O. Alves
University of Michigan

Topics & keywords

Topics

Keywords

Lyman-alpha forest
Alpha (finance)
Baryon acoustic oscillations
Baryon
Physics
Astronomy
Astrophysics
Psychology

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