The massive neutrinos of the Cosmic Neutrino Background (C$ν$B) are fundamental ingredients of the radiation-dominated early universe and are important non-relativistic probes of the large-scale structure formation in the late universe. The dominant source of anisotropies in the neutrino flux distribution on the sky are highly amplified integrals of metric perturbations encountered during the non-relativistic phase of the C$ν$B. This paper numerically compares the line-of-sight methods for computing C$ν$B anisotropies with the Einstein-Boltzmann hierarchy solutions in linear theory for a range of neutrino masses. Angular power spectra are computed that are relevant to a future polarized tritium target run of the PTOLEMY experiment. Correlations between the C$ν$B sky maps and galactic survey data are derived using line-of-sight techniques and discussed in the context of multi-messenger astrophysics.
Multi-messenger and time-domain astronomy in the 2040s
DESY（德国电子同步辐射中心）；German Centre for Astrophysics - DZA（德国天体物理学中心）；University of Potsdam（波茨坦大学）；University of Amsterdam（阿姆斯特丹大学）；University of Cambridge（剑桥大学）；Liverpool John Moores University（利物浦约翰摩尔斯大学）；IJCLAB（巴黎第十一大学甲种实验室）；UGent（根特大学）；UCT/SAAO（开普敦大学/南非天文台）；Caltech（加州理工学院）；UTU（图尔库大学）；IAP（巴黎天体物理研究所）；UHH（汉堡大学）；IIT（印度理工学院）；INAF（意大利国家天体物理研究所）；ICE-CSIC（加泰罗尼亚天体物理学研究所）；AIP（马克斯·普朗克天体物理研究所）；Durham（杜伦大学）；Northwestern（西北大学）；Leicester（莱斯特大学）；RUB（鲁尔大学波鸿分校）
Using a multi-messenger and multi-wavelength observational strategy to probe the nature of dark energy through direct measurements of cosmic expansion history
Machine Learning for Multi-messenger Probes of New Physics and Cosmology: A Review and Perspective
Center for Theoretical Physics, College of Physics Science and Technology, Sichuan University（四川大学物理科学与技术学院理论物理中心）；INFN, Laboratori Nazionali di Frascati（意大利国家核物理研究所弗拉斯卡蒂国家实验室）；National Research Nuclear University “MEPHI”（莫斯科国立核研究大学（MEPHI））；Virtual Institute of Astroparticle Physics（虚拟高能天体物理研究所）；Research Institute of Physics, Southern Federal University（南联邦大学物理研究所）；College of Design and Innovation, Tongji University（同济大学设计创意学院）；Department of Physics, University of Rome “La Sapienza”（罗马第一大学物理系）；Istituto Nazionale Fisica Nucleare, Sezione di Roma（意大利国家核物理研究所罗马分部）；College of Arts, Media, and Technology, Chiang Mai University（清迈大学艺术、媒体与技术学院）
Illuminating the dark universe in the multi-messenger era
Université Paris-Saclay, CNRS, CEA（巴黎萨克雷大学，法国国家科学研究中心，法国原子能和替代能源委员会）；University of Cambridge（剑桥大学）；Max Planck Institute for Gravitational Physics (Albert Einstein Institute)（马克斯·普朗克引力物理研究所（爱因斯坦研究所））；Università degli Studi di Salerno（萨莱诺大学）；Institute for Basic Science (IBS)（韩国基础科学研究院）；Institute for Research in Fundamental Sciences (IPM)（伊朗基本科学研究院）
