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7 papers · 1 filter
An explicit scheme for multifluid magnetohydrodynamics
Stephen O'Sullivan, Turlough P. Downes
When modeling astrophysical fluid flows, it is often appropriate to discard the canonical magnetohydrodynamic approximation thereby freeing the magnetic field to diffuse with respe…
Haunted Kaluza Universe with Four-dimensional Lorentzian Flat, Kerr, and Taub-NUT Slices
Rossen I. Ivanov, Emil M. Prodanov
The duality between the original Kaluza's theory and Klein's subsequent modification is duality between slicing and threading decomposition of the five-dimensional spacetime. The f…
On global models for isolated rotating axisymmetric charged bodies; uniqueness of the exterior field
Raul Vera
A relatively recent study by Mars and Senovilla provided us with a uniqueness result for the exterior vacuum gravitational field generated by an isolated distribution of matter in…
Axially symmetric equilibrium regions of Friedmann-Lemaitre-Robertson-Walker universes
Brien C. Nolan, Raul Vera
The study of the matching of stationary and axisymmetric spacetimes with Friedmann-Lemaitre-Robertson-Walker spacetimes preserving the axial symmetry is presented. We show, in part…
Even perturbations of self-similar Vaidya space-time
Brien C. Nolan, Thomas J. Waters
We study even parity metric and matter perturbations of all angular modes in self-similar Vaidya space-time. We focus on the case where the background contains a naked singularity.…
Pseudo-Newtonian Potential for Charged Particle in Kerr-Newman Geometry
Rossen I. Ivanov, Emil M. Prodanov
We consider the equatorial circular motion of a test particle of specific charge q/m << 1 in the Kerr-Newman geometry of a rotating charged black hole. We find the particle's conse…