DESI类星系调查双谱上的目录级盲法

IF 5.3 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Sergi Novell-Masot, Héctor Gil-Marín, Licia Verde, J. Aguilar, S. Ahlen, S. Brieden, D. Brooks, T. Claybaugh, A. de la Macorra, J.E. Forero-Romero, E. Gaztañaga, S.Gontcho A. Gontcho, G. Gutierrez, K. Honscheid, C. Howlett, R. Kehoe, T. Kisner, A. Lambert, M.E. Levi, M. Manera, A. Meisner, R. Miquel, G. Niz, F. Prada, G. Rossi, E. Sanchez, M. Schubnell, H. Seo, D. Sprayberry, G. Tarlé and B.A. Weaver
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引用次数: 0

摘要

我们评估了 Brieden 等人(2020 年)在固定模板功率谱和双谱分析中提出的星表级盲分析技术(盲分析)的性能。这种盲法是为类似暗能量光谱仪(DESI)的星系红移测量而量身定做的,包括两个部分:所谓的 "AP 盲法"(关于扩张参数α∥,α⊥)和 "RSD 盲法"(红移空间扭曲,影响增长率参数 f)。通过广泛的测试,包括检查立方体盒中的 RSD 部分、AP 致盲对具有实际巡天覆盖范围的模拟的影响,以及实施完整的 AP+RSD 致盲管道,我们的分析证明了当分析包括双谱统计时,该技术在保持宇宙学参数估计完整性方面的有效性。我们强调了复杂且难以意外解除盲法在精密宇宙学中的关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Catalog-level blinding on the bispectrum for DESI-like galaxy surveys
We evaluate the performance of the catalog-level blind analysis technique (blinding) presented in Brieden et al. (2020) in the context of a fixed template power spectrum and bispectrum analysis. This blinding scheme, which is tailored for galaxy redshift surveys similar to the Dark Energy Spectroscopic Instrument (DESI), has two components: the so-called “AP blinding” (concerning the dilation parameters α∥, α⊥) and “RSD blinding” (redshift space distortions, affecting the growth rate parameter f). Through extensive testing, including checks for the RSD part in cubic boxes, the impact of AP blinding on mocks with realistic survey sky coverage, and the implementation of a full AP+RSD blinding pipeline, our analysis demonstrates the effectiveness of the technique in preserving the integrity of cosmological parameter estimation when the analysis includes the bispectrum statistic. We emphasize the critical role of sophisticated — and difficult to accidentally unblind — blinding methods in precision cosmology.
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来源期刊
Journal of Cosmology and Astroparticle Physics
Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理
CiteScore
10.20
自引率
23.40%
发文量
632
审稿时长
1 months
期刊介绍: Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.
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