23 citations · 114 across the 12 of their papers we have counts for
12 papers
Central accumulation of magnetic flux in massive Seyfert galaxies as a possible engine to trigger ultrahigh energy cosmic rays
R. C. Anjos, C. H. Coimbra-Araujo
In the present paper we investigate the production of ultrahigh energy cosmic rays (UHECRs) from Seyferts. We discuss the UHECR luminosities obtained by two possible engine trigger…
Stability of perturbed geodesics in axisymmetric spacetimes
C. H. Coimbra-Araujo, R. C. Anjos
The effect of self-gravity of a disk matter is evaluated by the simplest modes of oscillation frequencies for perturbed circular geodesics. It is plotted the radial profiles of fre…
Casadio-Fabbri-Mazzacurati Black Strings and Braneworld-induced Quasars Luminosity Corrections
Roldao da Rocha, A. Piloyan, A. M. Kuerten +1
This paper aims to evince the corrections on the black string warped horizon in the braneworld paradigm, and their drastic physical consequences, as well as to provide subsequent a…
Gravity with extra dimensions and dark matter interpretation: Phenomenological example via Miyamoto-Nagai galaxy
P. S. Letelier, C. H. Coimbra-Araujo
A configuration whose density profile coincides with the Newtonian potential for spiral galaxies is constructed from a 4D isotropic metric plus extra dimensional components. A Miya…
Brownian motion of black holes in stellar systems with non-Maxwellian distribution for the stars field
I. T. Pedron, C. H. Coimbra-Araujo
A massive black hole at the center of a dense stellar system, such as a globular cluster or a galactic nucleus, is subject to a random walk due gravitational encounters with nearby…
A thin disk in higher dimensional space-time and dark matter interpretation
Carlos H. Coimbra-Araujo, Patricio S. Letelier
We find a family of exact solutions of Einstein equations describing the field of a static axisymmetric thin disk living in six-dimensional space-time. In particular, we study the…