2021/06/30 by A. Ricciardone, Angelo Ricciardone, L. Valbusa Dall’Armi +9
Physics and Astronomy · #Big Bang (financial markets) #COSMIC cancer database #Cosmic background radiation #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #General relativity #Gravitational wave #Gravitational wave background #Noncommutative and Quantum Gravity Theories #Planck #Pulsars and Gravitational Waves Research #Realization (probability) #astro-ph.CO #gr-qc
paper · pdf · doi:10.1103/physrevlett.127.271301
6 pages, 6 figures, 3 appendices. Minor changes to match the published Physical Review Letter version
openalex created_date 2021/06/22 · openalex publication_date 2021/12/27 · arxiv created 2021/12/30 · arxiv updated 2022/01/05 · openalex updated_date 2026/08/05
General relativity provides us with an extremely powerful tool to extract at the same time astrophysical and cosmological information from the stochastic gravitational-wave backgrounds (SGWBs): the cross-correlation with other cosmological tracers, since their anisotropies share a common origin and the same perturbed geodesics. In this Letter we explore the cross-correlation of the cosmological and astrophysical SGWBs with cosmic microwave background (CMB) anisotropies, showing that future GW detectors, such as LISA or BBO, have the ability to measure such cross-correlation signals. We also present, as a new tool in this context, constrained realization maps of the SGWBs extracted from the high-resolution CMB Planck maps. This technique allows, in the low-noise regime, to faithfully reconstruct the expected SGWB map by starting from CMB measurements.