Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Almeida, Gabriel Luz"'
We explore the post-Newtonian dynamics of spinning black hole (BH) binaries in Einstein-ScalarGauss-Bonnet (ESGB) gravity, a theory that modifies general relativity by introducing a massless scalar field coupled nonminimally to gravity via the Gauss-
Externí odkaz:
http://arxiv.org/abs/2408.14196
Autor:
Almeida, Gabriel Luz
Publikováno v:
Phys.Rev.D 109 (2024) 8, 084060
Using effective field theory methods, we compute in detail the Lagrangian for the conservative dynamics of compact binary systems, for spinless constituents and in the gravitationally bound case, in massless scalar-tensor (ST) and Einstein-scalar-Gau
Externí odkaz:
http://arxiv.org/abs/2402.13996
Autor:
Almeida, Gabriel Luz
In this thesis, we study emission amplitudes for the class of nonlinear processes of tails, which are processes of order $G_N^2$, and represent the effect of scattering gravitational radiation off the static background curvature, including not only m
Externí odkaz:
http://arxiv.org/abs/2309.00772
We re-analyze the far zone contribution to the two-body conservative dynamics arising from interaction between radiative and longitudinal modes, the latter sourced by mass and angular momentum, which in the mass case is known as tail process. We veri
Externí odkaz:
http://arxiv.org/abs/2307.05327
We compute the contribution to the two-body scattering angle of a specific class of interactions involving the exchange of gravitational radiative degrees of freedom, including the nonlinear memory process and square of radiation reaction effects. Ou
Externí odkaz:
http://arxiv.org/abs/2209.11594
We compute tail contributions to the conservative dynamics of a generic self-gravitating system, for every multipole order, of either electric and magnetic parity. Such contributions arise when gravitational radiation is backscattered by the static c
Externí odkaz:
http://arxiv.org/abs/2110.14146
We compute the effect of scattering gravitational radiation off the static background curvature, up to second order in Newton constant, known in literature as tail and tail-of-tail processes, for generic electric and magnetic multipoles. Starting fro
Externí odkaz:
http://arxiv.org/abs/2107.02634
Publikováno v:
JHEP 11 (2020) 165
We apply the classical double copy to the calculation of self-energy of composite systems with multipolar coupling to gravitational field, obtaining next-to-leading order results in the gravitational coupling $G_N$ by generalizing color to kinematics
Externí odkaz:
http://arxiv.org/abs/2008.06195
Autor:
Batista, Carlos, Almeida, Gabriel Luz
A new class of higher-dimensional exact solutions of Einstein's vacuum equation is presented. These metrics are written in terms of the exponential of a symmetric matrix and when this matrix is diagonal the solution reduces to higher-dimensional gene
Externí odkaz:
http://arxiv.org/abs/1808.09998
Autor:
Batista, Carlos, Almeida, Gabriel Luz
Publikováno v:
Phys. Rev. D 98, 044030 (2018)
Starting with a subclass of the four-dimensional spaces possessing two commuting Killing vectors and a non-trivial Killing tensor, we fully integrate Einstein's vacuum equation with a cosmological constant. Although most of the solutions happen to be
Externí odkaz:
http://arxiv.org/abs/1805.09206