Zobrazeno 1 - 10
of 148
pro vyhledávání: '"da Silva, M. F. P."'
Along the lines of the Einstein-Rosen wave equation of General Relativity (GR), we derive a gravitational wave equation with cylindrical symmetry in the Einstein-aether (EA) theory. We show that the gravitational wave in the EA is periodic in time fo
Externí odkaz:
http://arxiv.org/abs/2401.00339
Publikováno v:
Physics Letters B, Volume 850, 2024, 138544
We attempt to answer whether Birkhoff's theorem (BT) is valid in the Einstein-Aether (EA) theory. The BT states that any spherically symmetric solution of the vacuum field equations must be static, unique, and asymptotically flat. For a general spher
Externí odkaz:
http://arxiv.org/abs/2211.07497
Autor:
Mesquita, A. C., da Silva, M. F. A.
We model a compact radiant star that undergoes gravitational collapse from a certain initial static configuration until it becomes a black hole. The star consists of a fluid with anisotropy in pressures, bulk viscosity, in addition to the radial heat
Externí odkaz:
http://arxiv.org/abs/2210.14288
We analyze several spherically symmetric exterior vacuum solutions allowed by the Einstein-Aether (EA) theory with a non static aether and study the thermodynamics of their Killing and universal horizons. We show that there are five classes of soluti
Externí odkaz:
http://arxiv.org/abs/2112.14978
Autor:
Chan, R., da Silva, M. F. A.
In this work we present all the possible solutions for a static cylindrical symmetric spacetime in the Einstein-Aether (EA) theory. As far as we know, this is the first work in the literature that considers cylindrically symmetric solutions in the th
Externí odkaz:
http://arxiv.org/abs/2102.07749
We investigate some models of compact objects in the general relativity theory with cosmological constant $\Lambda$, based on two density profiles, one of them attributed to Stewart and the other one to Durgapal and Bannerji, proposed in the literatu
Externí odkaz:
http://arxiv.org/abs/2006.11626
Autor:
Pretel, J. M. Z., da Silva, M. F. A.
Publikováno v:
MNRAS, 495 (2020), 5027
We discuss the stability and construct dynamical configurations describing the gravitational collapse of unstable neutron stars with realistic equations of state compatible with the recent LIGO-Virgo constraints. Unlike other works that consider the
Externí odkaz:
http://arxiv.org/abs/2005.13651
Publikováno v:
The European Physical Journal C 81, 317 (2021)
In the present work we analyze all the possible spherically symmetric exterior vacuum solutions allowed by the Einstein-Aether theory with static aether. We show that there are four classes of solutions corresponding to different values of a combinat
Externí odkaz:
http://arxiv.org/abs/2003.00227
How do the global properties of a Lorentzian manifold change when endowed with a vector field? This interesting question is tackled in this paper within the framework of Einstein-Aether (EA) theory which has the most general diffeomorphism-invariant
Externí odkaz:
http://arxiv.org/abs/1912.12845
Autor:
Pretel, J. M. Z., da Silva, M. F. A.
Publikováno v:
Gen. Relativ. Gravit., 51 (2019), 3
This paper presents a hydrodynamic and thermodynamic treatment of a radiant star model that undergoes a dissipative gravitational collapse, from a certain initial configuration until it becomes a black hole. The collapsing star consists of a locally
Externí odkaz:
http://arxiv.org/abs/1809.02729