Gravitational Waves Propagation through the Stochastic Background of Gravitational Waves

Autor(es)

Frajuca, C. ; Bortoli, F. S. ; Nakamoto, F. Y. ; Santos, G. A. ; Meshkov, S

• Tipo de documento: Artigo Científico
• Fonte: WAKE CONFERENCE 2021; v. 957, p. 6-pg., 2018-01-01.

Resumo

With the recent claim that gravitational waves were finally detected and with other efforts around the world for GWs detection, its is reasonable to imagine that the relic gravitational wave background could be detected in some time in the future and with such information gather some hints about the origin of the universe. But, it's also be considered that gravity has self-interaction, with such assumption it's reasonable to expect that these gravitational wave will interact with the relic or non-relic GW background by scattering, for example. Such interaction should decrease the distance which such propagating waves could be detected The propagation of gravitational waves (GWs) is analyzed in an asymptotically de Sitter space by the perturbation expansion around Minkowski space using a scalar component. Using the case of de Sitter inflationary phase scenario, the perturbation propagates through a FRW background. The GW, using the actual value for the Hubble scale (H-0), has a damping factor with a very small valor for the size of the observational universe; the stochastic relic GW background is given by a dimensionless function of the frequency. In this work we analyze this same damping including the gravitational wave background due to astrophysical sources such background is 3 orders of magnitude bigger in some frequencies and produces a higher damping factor. (AU)

• Processo FAPESP: 13/26258-4 - Matéria superdensa no universo
• Beneficiário: Manuel Máximo Bastos Malheiro de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 06/56041-3 - Nova física no espaço: ondas gravitacionais
• Beneficiário: Odylio Denys de Aguiar
• Modalidade de apoio: Auxílio à Pesquisa - Temático