A family of spherically symmetric solutions in the model with 1component anisotropic fluid is considered. The metric of the solution depends on a parameter q > 0 relating radial pressure and the density and contains n − 1 parameters corresponding to Ricci-flat “internal space” metrics. For q = 1 and certain equations of state (pi = ±ρ) the metric coincides with the metric of black brane solutio...

In the framework of the dielectric theory, we present the electron energy loss probability distribution calculated for a fast probe near cylindrical surfaces using a non-local dielectric function. The small size of the drilled holes in experiments and electron trajectories close to the interface make necessary the introduction of dispersion effects when describing the energy loss spectra. We co...

We show that the pathology which afflicts the Hartle-Hawking vacuum on the Kerr black hole space-time can be regarded as due to rigid rotation of the state with the horizon in the sense that when the region outside the speed-of-light surface is removed by introducing a mirror, there is a state with the defining features of the Hartle-Hawking vacuum. In addition, we show that when the field is i...

Reynolds & Begelman (1997) have recently proposed a model in which the broad and extremely redshifted iron line seen during a deep minimum of the light curve of the Seyfert 1 galaxy MCG–6-30-15 originates from matter spiralling into a Schwarzschild black hole, contrary to previous claims that the black hole may be spinning rapidly (Iwasawa et al 1996; Dabrowski et al 1997). Here we calculate in...

In this article, we present an overview of the new developments in problems of the plasma influence on the effects of gravitational lensing, complemented by pieces of new material and relevant discussions. Deflection of light in the presence of gravity and plasma is determined by a complex combination of various physical phenomena: gravity, dispersion, refraction. In particular, the gravitation...

We report new theoretical results and analysis for the transport properties of superconducting UPt3 based on the leading models for the pairing symmetry. We use Fermi surface data and the measured inelastic scattering rate to show that the low-temperature thermal conductivity and transverse sound attenuation in the A and B phase of UPt3 are in excellent agreement with pairing states belonging t...

We study dispersive properties for the wave equation in the Kerr spacetime with small angular momentum. The main result of this paper is to establish uniform energy bounds and local energy decay for such backgrounds. This follows similar results for the Schwarzschild space-time proved earlier in [4], [9] and [12] and extended in earlier work [32] of the authors and collaborators.

Using thermal quantization of geodesics confined under horizons and reasonable conjecture on massless modes, we evaluate quantum spectrum of Kerr black hole masses compatible with superstring symmetries.

The general equation governing the mass, spin and angular momentum of a KerrNewman black hole applies equally well to a proton when the gravitational coupling constant predicted by a discrete fractal paradigm is used in the equation, along with the standard mass, spin and angular momentum of the proton. c © Electronic Journal of Theoretical Physics. All rights reserved.

tetrad invariant waveform, ψI , by explicit construction. This waveform is formed by the second order piece of ψ4 plus a term, quadratic in first order perturbations, chosen to make ψI totally invariant and to have the appropriate behavior in an asymptotically flat gauge. ψI fulfills a single wave equation of the form T ψI = S, where T is the same wave operator as for first order perturbations ...