Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 27, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.271301
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Funding
- ASI [2016-24-H.0]
- project Combining Cosmic Microwave Background and Large Scale Structure data: an Integrated Approach for Addressing Fundamental Questions in Cosmology - MIUR Progetti di Ricerca di Rilevante Interesse Nazionale (PRIN) Bando 2017-grant [2017YJYZAH]
- MIUR through the Dipartimenti di eccellenza project Science of the Universe
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General relativity offers a powerful tool to extract both astrophysical and cosmological information from stochastic gravitational-wave backgrounds by cross-correlation with other cosmological tracers. Future GW detectors like LISA or BBO are capable of measuring such cross-correlation signals. Additionally, constrained realization maps of SGWBs extracted from high-resolution CMB Planck maps provide a new tool for faithfully reconstructing the expected SGWB map in the low-noise regime.
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 crosscorrelation 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.
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