Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Micu, Octavian"'
Autor:
Micu, Octavian
We investigate the dynamical stability of bootstrapped Newtonian stars following homologous adiabatic perturbations, focusing on objects of low or intermediate compactness. The results show that for stars with homogeneous densities these perturbation
Externí odkaz:
http://arxiv.org/abs/2402.15323
Autor:
Casadio, Roberto, Micu, Octavian
The idea that gravity can act as a regulator of ultraviolet divergences is almost a century old and has inspired several approaches to quantum gravity. In fact, a minimum Planckian length can be shown to emerge from the nonlinear dynamics of gravity
Externí odkaz:
http://arxiv.org/abs/2303.14945
We study binary mergers in bootstrapped Newtonian gravity, where higher-order couplings are added to the non-relativistic Lagrangian for the Newtonian potential. In this theory, the Arnowitt-Deser-Misner (ADM) mass differs from both the proper mass o
Externí odkaz:
http://arxiv.org/abs/2206.13588
We study the possible existence of a Newtonian regime of gravity in $1+1$ dimensions, considering metrics in both the Kerr-Schild and conformal forms. In the former case, the metric gives the exact solution of the Poisson equation in flat space, but
Externí odkaz:
http://arxiv.org/abs/2205.12229
Publikováno v:
Eur. Phys. J. C (2022) 82:609
We consider compact objects in a classical and non-relativistic generalisation of Newtonian gravity, dubbed bootstrapped Newtonian theory, which includes higher-order derivative interaction terms of the kind generically present in the strong-field re
Externí odkaz:
http://arxiv.org/abs/2205.04926
We study the bootstrapped Newtonian potential generated by a localised source in one and two spatial dimensions, and show that both cases naturally lead to finite spatial extensions of the outer vacuum. We speculate that this implies the necessary ex
Externí odkaz:
http://arxiv.org/abs/2008.13465
Autor:
Casadio, Roberto, Micu, Octavian
Publikováno v:
Phys. Rev. D 102, 104058 (2020)
We study self-gravitating stars in the bootstrapped Newtonian picture for polytropic equations of state. We consider stars that span a wide range of compactness values. Both matter density and pressure are sources of the gravitational potential. Nume
Externí odkaz:
http://arxiv.org/abs/2005.09378
We show that the bootstrapped Newtonian potential generated by a uniform and isotropic source does not depend on the one-loop correction for the matter coupling to gravity. The latter however affects the relation between the proper mass and the ADM m
Externí odkaz:
http://arxiv.org/abs/1910.03243
We study equilibrium configurations of a homogenous ball of matter in a bootstrapped description of gravity which includes a gravitational self-interaction term beyond the Newtonian coupling. Both matter density and pressure are accounted for as sour
Externí odkaz:
http://arxiv.org/abs/1904.06752
Autor:
Casadio, Roberto, Micu, Octavian
We study the probability that a horizon appears when concentric shells of matter collide, by computing the horizon wave-function of the system. We mostly consider the collision of two ultra-relativistic shells, both shrinking and expanding, at the mo
Externí odkaz:
http://arxiv.org/abs/1806.05944