111 citations · 446 across the 18 of their papers we have counts for
18 papers
Local thermodynamical equilibrium and relativistic dissipation
J Félix Salazar, Thomas Zannias
We introduce a class of relativistic fluid states satisfying the relativistic local thermodynamical equilibrium postulate (abbreviated as relativistic (LTE) postulate). States sati…
On Extended Thermodynamics: From Classical to the Relativistic Regime
Jose Felix Salazar, Thomas Zannias
The recent monumental detection of gravitational waves by LIGO, the subsequent detection by the LIGO/VIRGO observatories of a binary neutron star merger seen in the gravitational w…
On the Integrability of the Geodesic Flow on a Friedmann-Robertson-Walker Spacetime
Francisco Astorga, J. Felix Salazar, Thomas Zannias
We study the geodesic flow on the cotangent bundle of a Friedman-Robertson-Walker spacetime (M, g). On this bundle, the HamiltonJacobi equation is completely separable and this sep…
On causality violation on a Kerr-de Sitter spacetime
Thomas Zannias
The causal properties of the family of Kerr-de Sitter spacetimes are analyzed and compared to those of the Kerr family. At first we show that a Kerr-de Sitter spacetime can be view…
On the behavior of causal geodesics on a Kerr-de Sitter spacetime
José Félix Salazar, Thomas Zannias
We analyze the behavior of causal geodesics on a Kerr-de Sitter spacetime with particular emphasis on their completeness property. We set up an initial value problem (IVP) whose so…
On the global structure of Kerr-de Sitter spacetimes
Kayll Lake, Thomas Zannias
Taking advantage of the natural length scale set by the cosmological constant , conditions on the parameters have been found, so that a Kerr-de Sitter specetim…
Shadow of a naked singularity
Néstor Ortiz, Olivier Sarbach, Thomas Zannias
We analyze the redshift suffered by photons originating from an external source, traversing a collapsing dust cloud and finally being received by an asymptotic observer. In additio…
On the behaviour of non-radial null geodesics in self-similar Tolman-Bondi collapse
Néstor Ortiz, Olivier Sarbach, Thomas Zannias
Motivated by recent work on the structure of the singularity in inhomogeneous Tolman-Bondi collapse models, we investigate the behaviour of null geodesics in the particular case wh…
The evolution of a spatially homogeneous and isotropic universe filled with a collisionless gas
Francisco Astorga, Olivier Sarbach, Thomas Zannias
We review the evolution of a spatially homogeneous and isotropic universe described by a Friedmann-Robertson-Walker spacetime filled with a collisionless, neutral, simple, massive…
Observational distinction between black holes and naked singularities: the role of the redshift function
Néstor Ortiz, Olivier Sarbach, Thomas Zannias
We suggest that the redshift of photons traveling from past to future null infinity through a collapsing object could provide an observational signature capable of differentiating…
Tangent bundle formulation of a charged gas
Olivier Sarbach, Thomas Zannias
We discuss the relativistic kinetic theory for a simple, collisionless, charged gas propagating on an arbitrary curved spacetime geometry. Our general relativistic treatment is for…
The geometry of the tangent bundle and the relativistic kinetic theory of gases
Olivier Sarbach, Thomas Zannias
This article discusses the relativistic kinetic theory for a simple collisionless gas from a geometric perspective. We start by reviewing the rich geometrical structure of the tang…
Relativistic Kinetic Theory: An Introduction
Olivier Sarbach, Thomas Zannias
We present a brief introduction to the relativistic kinetic theory of gases with emphasis on the underlying geometric and Hamiltonian structure of the theory. Our formalism starts…
The propagation of particles and fields in wormhole geometries
Olivier Sarbach, Thomas Zannias
We discuss several properties of static, spherically symmetric wormholes with particular emphasis on the behavior of causal geodesics and the propagation of linear fields. We show…
Nonlinear instability of wormholes supported by exotic dust and a magnetic field
Olivier Sarbach, Thomas Zannias
Recently, spherically symmetric, static wormholes supported by exotic dust and a radial magnetic field have been derived and argued to be stable with respect to linear radial fluct…
On Wormholes supported by phantom energy
J. A. Gonzalez, F. S. Guzman, N. Montelongo-Garcia +1
By a combination of analytical and numerical techniques, we demonstrate the existence of spherical, asymptotically flat traversable wormholes supported by exotic matter whose stres…
The Extended Power Law as Intrinsic Signature For a Black Hole
Lev Titarchuk, Thomas Zannias
We analyze the exact general relativistic exact integro-differential equation of radiative transfer describing the interaction of low energy photons with a Maxwellian distribution…
Black holes cannot support conformal scalar hair
T. Zannias
It is shown that the only static asymptotically flat non-extrema black hole solution of the Einstein-conformally invariant scalar field equations having the scalar field bounded on…