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DESI 2024重子声学振荡的最优重构

Optimal Reconstruction of Baryon Acoustic Oscillations for DESI 2024

E. Paillas, Z. Ding, X. Chen, H. Seo, N. Padmanabhan, A. de Mattia, A. J. Ross, S. Nadathur, C. Howlett, J. Aguilar, S. Ahlen, O. Alves, U. Andrade, D. Brooks, … 展开作者

E. Paillas, Z. Ding, X. Chen, H. Seo, N. Padmanabhan, A. de Mattia, A. J. Ross, S. Nadathur, C. Howlett, J. Aguilar, S. Ahlen, O. Alves, U. Andrade, D. Brooks, E. Buckley-Geer, E. Burtin, S. Chen, T. Claybaugh, S. Cole, K. Dawson, A. de la Macorra, Arjun Dey, P. Doel, K. Fanning, S. Ferraro, J. E. Forero-Romero, C. Garcia-Quintero, E. Gaztañaga, H. Gil-Marín, S. Gontcho A Gontcho, G. Gutierrez, C. Hahn, M. M. S Hanif, K. Honscheid, M. Ishak, R. Kehoe, A. Kremin, M. Landriau, L. Le Guillou, M. E. Levi, M. Manera, P. Martini, L. Medina-Varela, A. Meisner, J. Mena-Fernández, R. Miquel, J. Moustakas, E. Mueller, A. Muñoz-Gutiérrez, A. D. Myers, J. A. Newman, J. Nie, G. Niz, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, F. Prada, A. Pérez-Fernández, M. Rashkovetskyi, M. Rezaie, A. Rosado-Marin, G. Rossi, R. Ruggeri, E. Sanchez, C. Saulder, E. F. Schlafly, D. Schlegel, M. Schubnell, D. Sprayberry, G. Tarlé, D. Valcin, M. Vargas-Magaña, J. Yu, S. Yuan, R. Zhou, H. Zou

AI总结:

本文通过DESI DR1盲测数据和模拟目录评估重构设置对BAO约束的影响,发现BAO结果对平滑尺度、红移空间畸变处理等因素保持稳健,并验证了端到端星系BAO管线在揭盲前的成熟度。

摘要:

重子声学振荡(BAO)提供了一根稳健的标准尺,可通过星系成团性测量宇宙的膨胀历史。密度场重构现已成为提高BAO探测精度和准确度的一项被广泛采用的流程。为了找到将用于DESI 2024星系BAO分析的最优重构设置,我们评估了重构后BAO约束对我们分析配置中不同选择的敏感度,在来自DESI观测第一年(DR1)的盲测数据上进行了测试,并在模拟预期DESI DR1目标样本成团性和选择性质的模拟目录上进行了测试。总体而言,我们发现BAO约束在重构过程的多个方面都保持稳健,包括平滑尺度的选择、红移空间畸变的处理、光纤分配不完备性以及BAO模型的参数化方式。我们还展示了一系列DESI所遵循的测试,用于在大尺度结构星表揭盲之前评估端到端星系BAO管线的成熟度。

英文摘要:

Baryon acoustic oscillations (BAO) provide a robust standard ruler to measure the expansion history of the Universe through galaxy clustering. Density-field reconstruction is now a widely adopted procedure for increasing the precision and accuracy of the BAO detection. With the goal of finding the optimal reconstruction settings to be used in the DESI 2024 galaxy BAO analysis, we assess the sensitivity of the post-reconstruction BAO constraints to different choices in our analysis configuration, performing tests on blinded data from the first year of DESI observations (DR1), as well as on mocks that mimic the expected clustering and selection properties of the DESI DR1 target samples. Overall, we find that BAO constraints remain robust against multiple aspects in the reconstruction process, including the choice of smoothing scale, treatment of redshift-space distortions, fiber assignment incompleteness, and parameterizations of the BAO model. We also present a series of tests that DESI followed in order to assess the maturity of the end-to-end galaxy BAO pipeline before the unblinding of the large-scale structure catalogs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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