DESI 2024 IV: Baryon Acoustic Oscillations from the Lyman alpha forest

作者：A. G. Adame, J. Aguilar, S. P. Ahlen, Shadab Alam, D. M. Alexander, Marcelo A. Alvarez, O. Alves, Abhijeet Anand, U. Andrade, E. Armengaud, S. Àvila, Alejandro Avilés, H. Awan, S. Bailey, C. Baltay, A. Bault, J. Bautista, J. Behera, S. BenZvi, Florian Beutler, Davide Bianchi, Chris Blake, Robert Blum, S. Brieden, A. Brodzeller, D. Brooks, E. Buckley‐Geer, E. Burtin, R. Calderón, R. E. A. Canning, A. Carnero Rosell, R. Cereskaite, Jorge L. Cervantes–Cota, Solène Chabanier, E. Chaussidon, J. Chaves-Montero, S. Chen, Xinyi Chen, T. Claybaugh, S. Cole, Andrei Cuceu, T. M. Davis, Kyle Dawson, Rodrigo de la Cruz, Axel de la Macorra, Arnaud de Mattia, N. Deiosso, Arjun Dey, Biprateep Dey, Jiani Ding, Z. Ding, P. Doel, J. Edelstein, Sarah Eftekharzadeh, Daniel J. Eisenstein, A. Elliott, Parker Fagrelius, K. Fanning, Simone Ferraro, J. Ereza, N. Findlay, B. Flaugher, Andreu Font-Ribera, D. Forero-Sánchez, J. E. Forero-Romero, C. García-Quintero, E. Gaztañaga, Héctor Gil-Marín, Satya Gontcho A Gontcho, Alma X. González‐Morales, Violeta González-Pérez, C. Gordon, D. Green, D. Gruen, Rafaela Gsponer, G. Gutierrez, J. Guy, Boryana Hadzhiyska, ChangHoon Hahn, M. Hanif, H. K. Herrera-Alcantar, K. Honscheid, Cullan Howlett, Dragan Huterer, Vid Iršič, Mustapha Ishak, S. Juneau, Naim Göksel Karaçaylı, R. Kehoe, S. Kent, D. Kirkby, Anthony Kremin, Alex Krolewski, Ying‐Cheng Lai, T.-W. Lan, Martin Landriau, Dustin Lang, J. Lasker, J.M. Le Goff, L. Le Guillou, Alexie Leauthaud, M. E. Levi, T. S. Li, Eric V. Linder, K. Lodha, C. Magneville, Marc Manera, Daniel Margala, Paul Martini, M Maus, Patrick McDonald, L. Medina-Varela, Aaron Meisner, J. Mena-Fernández, R. Miquel, J. Moon, Shannon Moore, John Moustakas, Eva-Maria Mueller, A. Muñoz-Gutiérrez, Adam D. Myers, S. Nadathur, L. Napolitano, Richard Neveux, Jeffrey A. Newman, Nhat-Minh Nguyen, J. Nie, Gustavo Niz, H. E. Noriega, Nikhil Padmanabhan, E. Paillas, N. Palanque‐Delabrouille, J. Pan, S. Penmetsa, Will J. Percival, Matthew M. Pieri, M. Pinon, Claire Poppett, A. Porredon, Francisco Prada, A. Pérez-Fernández, Ignasi Pérez-Ràfols, D. Rabinowitz, A. Raichoor, C. Ramírez-Pérez, S. Ramírez-Solano, M. Rashkovetskyi, C. Ravoux, Mehdi Rezaie, J. Rich, A. Rocher, C. M. Rockosi, Natalie A. Roe, A. Rosado-Marin, Ashley J. Ross, Graziano Rossi, Rossana Ruggeri, V. Ruhlmann-Kleider, Lado Samushia, E. Sánchez, Christoph Saulder, Edward F. Schlafly, David J. Schlegel, M. Schubnell, Hee‐Jong Seo, R. M. Sharples, J. Silber, Francesco Sinigaglia, A. Slosar, A. G. Smith, D. Sprayberry, T. Tan, G. Tarlé, S. Trusov, R. Vaisakh, D. Valcin, F. Valdés, M. Vargas-Magaña, Licia Verde, Michael Walther, B. Wang, M. S. Wang, B. A. Weaver, N. Weaverdyck, Risa H. Wechsler, David H. Weinberg, Martin White, Jiaxi Yu, Y. Yu, Sihan Yuan, C. Yèche, E. A. Zaborowski, Pauline Zarrouk, H. Zhang, Cheng Zhao, Ruiyang Zhao, Rongpu Zhou, Hu Zou · 发表于：Journal of Cosmology and Astroparticle Physics · 年份：2025 · DOI：10.1088/1475-7516/2025/01/124 · 被引用次数：254 · 研究领域：Galaxies: Formation, Evolution, Phenomena、Radio Astronomy Observations and Technology、Astrophysics and Cosmic Phenomena

Abstract We present the measurement of Baryon Acoustic Oscillations (BAO) from the Lyman- α (Ly α ) forest of high-redshift quasars with the first-year dataset of the Dark Energy Spectroscopic Instrument (DESI). Our analysis uses over 420 000 Ly α forest spectra and their correlation with the spatial distribution of more than 700 000 quasars. An essential facet of this work is the development of a new analysis methodology on a blinded dataset. We conducted rigorous tests using synthetic data to ensure the reliability of our methodology and findings before unblinding. Additionally, we conducted multiple data splits to assess the consistency of the results and scrutinized various analysis approaches to confirm their robustness. For a given value of the sound horizon ( r d ), we measure the expansion at z eff = 2.33 with 2% precision, H ( z eff ) = ( 239.2 ± 4.8 ) (147.09 Mpc / r d ) km/s/Mpc. Similarly, we present a 2.4% measurement of the transverse comoving distance to the same redshift, D M ( z eff ) = ( 5.84 ± 0.14 ) ( r d /147.09 Mpc) Gpc. Together with other DESI BAO measurements at lower redshifts, these results are used in a companion paper to constrain cosmological parameters.