Blinding scheme for the scale-dependence bias signature of local primordial non-Gaussianity for DESI 2024
E. Chaussidon, A. de Mattia, C. Yèche, J. Aguilar, S. Ahlen, D. Brooks, T. Claybaugh, S. Cole, A. de la Macorra, P. Doel, K. Fanning, E. Gaztañaga, S. Gontcho A… 展开作者
E. Chaussidon, A. de Mattia, C. Yèche, J. Aguilar, S. Ahlen, D. Brooks, T. Claybaugh, S. Cole, A. de la Macorra, P. Doel, K. Fanning, E. Gaztañaga, S. Gontcho A Gontcho, C. Howlett, T. Kisner, A. Lambert, L. Le Guillou, M. Manera, A. Meisner, R. Miquel, G. Niz, N. Palanque-Delabrouille, W. J. Percival, F. Prada, A. J. Ross, G. Rossi, E. Sanchez, D. Schlegel, M. Schubnell, H. Seo, D. Sprayberry, G. Tarlé, M. Vargas-Magaña, B. A. Weaver, H. Zou
The next generation of spectroscopic surveys is expected to achieve an unprecedented level of accuracy in the measurement of cosmological parameters. To avoid confirmation bias and thereby improve the reliability of these results, blinding procedures become a standard practice in the cosmological analyses of such surveys. Blinding is especially crucial when the impact of observational systematics is important relative to the cosmological signal, and a detection of that signal would have significant implications. This is the case for local primordial non-gaussianity, as probed by the scale-dependent bias of the galaxy power spectrum at large scales that are heavily sensitive to the dependence of the target selection on the imaging quality, known as imaging systematics. We propose a blinding method for the scale-dependent bias signature of local primordial non-gaussianity at the density field level which consists in generating a set of weights for the data that replicate the scale-dependent bias. The applied blinding is predictable, and can be straightforwardly combined with other catalog-level blinding procedures that have been designed for the baryon acoustic oscillation and redshift space distortion signals. The procedure is validated through simulations that replicate data from the first year of observation of the Dark Energy Spectroscopic Instrument, but may find applications to other upcoming spectroscopic surveys.
Probing primordial non-Gaussianity with the power spectrum and bispectrum of future 21cm intensity maps
在再电离之后,星系中中性氢的21厘米发射线提供了暗物质的示踪物。使用SKA和其他射电望远镜进行的下一代强度测绘调查将覆盖大范围的天空区域和广泛的红移,便于将其用作原始非高斯性的探测器。{以前的工作已经表明,双谱可以实现对原始非高斯性的严格约束,未来的调查是专门设计用于干涉仪模式下的强度映射}。在这里,我们调查的约束条件,可从单碟模式下操作的调查,\rev{using the combined power spectrum and bispectrum signal}。在功率谱的情况下,单碟调查通常优于干涉仪调查。我们发现,相反的双谱:单碟调查是没有竞争力的干涉仪模式设计的调查。
Local primordial non-Gaussianity using cross-correlations of DESI tracers
Ohio University(俄亥俄大学);The Ohio State University(俄亥俄州立大学);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Boston University(波士顿大学);Università degli Studi di Milano(米兰大学);INAF-Osservatorio Astronomico di Brera(INAF-布雷拉天文台);University College London(伦敦大学学院);Universidad Nacional Autónoma de México(墨西哥国立自治大学);CEA, Université Paris-Saclay(法国原子能委员会,巴黎萨克雷大学);University of Rochester(罗切斯特大学)
The clustering of galaxies in the completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Primordial non-Gaussianity in Fourier Space
我们从扩展的重子声学振荡光谱巡天(eBOSS)的最终数据发布(DR 16)中的343,708个红移0.8 < z < 2.2分布在4808平方度上的类星体的集群中测量了局部原始非高斯性参数\fNLloc,这是迄今为止最大的光谱巡天。我们的分析是在傅立叶空间中进行的,使用功率谱在非常大的尺度来约束尺度依赖的晕偏置。我们仔细评估系统学对我们测量的影响,并测试多种污染去除方法。我们展示了我们的分析管道的鲁棒性与EZ模拟目录,模拟eBOSS DR 16目标选择。我们发现$f_\mathrm{NL}=-12\pm 21$(68%的置信度)的主要聚类样本,包括类星体的红移在0.8和2.2之间,利用一种新的神经网络计划清洗DR 16样本,特别是应用红移加权技术后,设计用于非高斯测量从大尺度结构,优化我们的分析,这提高了我们的结果37%。
The impact of our peculiar motion on primordial non-Gaussianity measurements using the LIGER4GAL framework
Università di Padova(帕多瓦大学);INFN Sezione di Padova(意大利国家核物理研究所帕多瓦分部);Università di Trieste(的里雅斯特大学);INAF, Osservatorio Astronomico di Trieste(意大利国家天体物理研究所的里雅斯特天文台);INFN, Sezione di Trieste(意大利国家核物理研究所的里雅斯特分部);IFPU, Institute for Fundamental Physics of the Universe(宇宙基础物理研究所);INAF, Osservatorio Astronomico di Padova(意大利国家天体物理研究所帕多瓦天文台);Argelander-Institut für Astronomie(阿尔根德天文学研究所)
Parity Violation in Galaxy Shapes: Primordial Non-Gaussianity
Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理研究所);Ludwig-Maximilians-Universität München(慕尼黑路德维希-马克西米利安大学);Kavli Institute for the Physics and Mathematics of the Universe (WPI)(卡弗里宇宙物理学与数学研究所);The University of Tokyo Institutes for Advanced Study (UTIAS)(东京大学高等研究院);The University of Tokyo(东京大学)
研究通过银河系内对齐性探测 parity 违反的原始非高斯性,利用有效场论框架分析 parity-odd 内对齐功率谱与原始三阶谱的关系,利用 N-body 模拟确定暗物质晕偏置参数,并预测 IA 的约束能力。
Field-Level Inference of Primordial Non-Gaussianity with the Quijote Simulation Suite
INAF/OAS Bologna(意大利国家天体物理研究所/博洛尼亚天文台);INFN, Sezione di Bologna(意大利国家核物理研究所/博洛尼亚分部);The Oskar Klein Centre, Department of Physics, Stockholm University(斯德哥尔摩大学奥谢·克莱因中心物理系);Institut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne Université(巴黎天体物理研究所,CNRS联合研究单位7095,索邦大学);Kavli Institute for Cosmology Cambridge(卡弗里宇宙学剑桥研究所);DAMTP, Centre for Mathematical Sciences, University of Cambridge(剑桥大学数学科学中心应用数学与理论物理系);Center for Computational Astrophysics(计算天体物理中心);Dipartimento di Fisica e Astronomia, Alma Mater Studiorum - University of Bologna(博洛尼亚大学物理与天文学系);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理学研究所);Université Paris-Saclay, CNRS, Institut d’Astrophysique Spatiale(巴黎萨克雷大学,CNRS,空间天体物理研究所);Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara(费拉拉大学物理与地球科学系);INFN, Sezione(意大利国家核物理研究所/分部)
Galaxy sizes as complementary (zero-)bias tracers of local primordial non-Gaussianity
Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo(东京大学数据驱动发现中心,Kavli宇宙学前沿研究所(WPI),UTIAS);Institute For Interdisciplinary Research in Science and Education, ICISE(ICISE跨学科科学研究与教育学院);Theory Center, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK)(高能加速器研究机构(KEK)粒子核研究理论中心);Center for Gravitational Physics and Quantum Information, Yukawa Institute for Theoretical Physics, Kyoto University(京都大学汤川理论物理研究所引力物理与量子信息研究中心);Korea Institute for Advanced Study(韩国高等研究院)
Local primordial non-Gaussianity from the large-scale clustering of photometric DESI luminous red galaxies
Kansas State University(堪萨斯州立大学);The Ohio State University(俄亥俄州立大学);Ohio University(俄亥俄大学);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology(巴塞罗那科学技术研究所高能物理研究所);University of Edinburgh(爱丁堡大学);Ruhr University Bochum(波鸿鲁尔大学);CEA, Université Paris-Saclay(巴黎萨克雷大学原子能与替代能源委员会);University of Waterloo(滑铁卢大学)
Separating the Inseparable: Constraining Arbitrary Primordial Bispectra with Cosmic Microwave Background Data
Leinweber Institute for Theoretical Physics at Stanford(斯坦福莱因韦伯理论物理研究所);Kavli Institute for Particle Astrophysics and Cosmology(卡弗里粒子天体物理与宇宙学研究所);Center for Theoretical Physics, Columbia University(哥伦比亚大学理论物理中心);Department of Physics and Astronomy, University of Pennsylvania(宾夕法尼亚大学物理与天文学系);Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo(东京大学UTIAS宇宙物理与数学卡弗里研究所(WPI))