Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Richarte, Martín G."'
Publikováno v:
Phys. Rev. D 109, 104068 (2024)
We performed a post-Newtonian analysis of the regularized four-dimensional Einstein-Gauss-Bonnet gravitational theory (4D-EGB). The resulting metric differs from the classical parametrized post-Newtonian (PPN) formalism in that a new gravitational po
Externí odkaz:
http://arxiv.org/abs/2402.13951
This study revisits the absorption and scattering process by which a massless scalar field impinges on a charged dilatonic black hole. First, we review the classical analysis to obtain the deflection angle and the differential scattering cross-sectio
Externí odkaz:
http://arxiv.org/abs/2111.01595
Publikováno v:
Phys. Rev. D 103, 045001 (2021)
We revisit here the analytical continuation approach usually employed to compute quasinormal modes (QNM) and frequencies of a given potential barrier $V$ starting from the bounded states and respective eigenvalues of the Schroedinger operator associa
Externí odkaz:
http://arxiv.org/abs/2010.10674
Publikováno v:
Eur. Phys. J. Plus (2020) 135:550
We constructed thin-shell wormholes using the well-known "cut and paste" technique for static black holes sourced by an anisotropic fluid within the context of the Rastall gravity. Using the generalized Lanczos equations we explored the energy condit
Externí odkaz:
http://arxiv.org/abs/2007.05641
Autor:
Richarte, Martin G., Simeone, Claudio
Publikováno v:
Phys. Rev. D 81, 109903 (2009)
Spherically symmetric thin-shell wormholes are studied within the framework of Einstein-Born-Infeld theory. We analyze the exotic matter content and find that for certain values of the Born-Infeld parameter the amount of exotic matter on the shell ca
Externí odkaz:
http://arxiv.org/abs/2006.12272
Publikováno v:
Eur. Phys. J. C (2019) 79: 492
We examine the evolution of non-relativistic cold dark matter gravitationally coupled to baryons with modes deep inside the Hubble radius (sub-horizon regime) using akinetic theory approach within the realm of Newtonian theory. We obtain the general
Externí odkaz:
http://arxiv.org/abs/2006.10889
Akademický článek
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We construct a piecewise model that gives a physical viable realization of finite-time future singularity for a spatially flat Friedmann-Robertson-Walker universe within the interacting dark matter--dark energy framework, with the latter one in the f
Externí odkaz:
http://arxiv.org/abs/1702.07743
Publikováno v:
The European Physical Journal C, 77(1), 1-11, 2017
We present a model of inflation where the inflaton is accommodated as a phantom field which exhibits an initial transient pole behavior and then decays into a quintessence field which is responsible for a radiation era. We must stress that the presen
Externí odkaz:
http://arxiv.org/abs/1612.03822
Publikováno v:
Phys. Rev. D 93, 064073 (2016)
We obtain the Maxwell-J\"uttner distribution function at first order in the post-Newtonian approximation within the framework of general relativity. Taking into account the aforesaid distribution function, we compute the particle four-flow and energy
Externí odkaz:
http://arxiv.org/abs/1603.05082