Current-carrying string loops in black-hole spacetimes with a repulsive cosmological constant

AbstractWe have developed a realistic, fully general relativistic computer code to simulate optical projection in a strong, spherically symmetric gravitational field. The standard theoretical analysis of optical projection for an observer in the vicinity of a Schwarzschild black hole is extended to black hole spacetimes with a repulsive cosmological constant, i.e, Schwarzschild-de Sitterspacetimes. Influence of the cosmological constant is investigated for static observers and observers radially free-falling from the static radius. Simulations include effects of the gravitational lensing, multiple images, Doppler and gravitational frequency shift, as well as the intensity amplification. The code generates images of the sky for the static observer and a movie simulations of the changing sky for the radially free-falling observer. Techniques of parallel programming are applied to get a high performance and a fast run of the BHC simulation code.

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INVERSE SCATTERING IN DE SITTER–REISSNER–NORDSTRÖM BLACK HOLE SPACETIMES

Reviews in Mathematical Physics ◽

10.1142/s0129055x10004004 ◽

2010 ◽

Vol 22 (04) ◽

pp. 431-484 ◽

Cited By ~ 8

Author(s):

THIERRY DAUDÉ ◽

FRANÇOIS NICOLEAU

Keyword(s):

Black Hole ◽

Cosmological Constant ◽

Inverse Scattering ◽

Scattering Matrix ◽

High Energy ◽

Reflection Coefficients ◽

De Sitter ◽

Exterior Region ◽

Transmission Coefficients ◽

Black Hole Spacetimes

In this paper, we study the inverse scattering of massive charged Dirac fields in the exterior region of (de Sitter)–Reissner–Nordström black holes. Firstly, we obtain a precise high-energy asymptotic expansion of the diagonal elements of the scattering matrix (i.e. of the transmission coefficients) and we show that the leading terms of this expansion allow to recover uniquely the mass, the charge and the cosmological constant of the black hole. Secondly, in the case of nonzero cosmological constant, we show that the knowledge of the reflection coefficients of the scattering matrix on any interval of energy also permits to recover uniquely these parameters.

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The mechanical first law of black hole spacetimes with a cosmological constant and its application to the Schwarzschild–de Sitter spacetime

Classical and Quantum Gravity ◽

10.1088/0264-9381/26/10/105010 ◽

2009 ◽

Vol 26 (10) ◽

pp. 105010 ◽

Cited By ~ 74

Author(s):

Miho Urano ◽

Akira Tomimatsu ◽

Hiromi Saida

Keyword(s):

Black Hole ◽

Cosmological Constant ◽

De Sitter Spacetime ◽

De Sitter ◽

Black Hole Spacetimes ◽

Sitter Spacetime

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Radiation in models with cosmological constant

Proceedings of the International Astronomical Union ◽

10.1017/s1743921307005583 ◽

2006 ◽

Vol 2 (S238) ◽

pp. 387-388

Author(s):

Hedvika Kadlecová ◽

Jiří Podolský

Keyword(s):

Black Hole ◽

Gravitational Field ◽

Cosmological Constant ◽

Exact Solutions ◽

Large Family ◽

Structure And Properties ◽

De Sitter ◽

Rotational Parameter ◽

Black Hole Spacetimes ◽

Type D

AbstractWe analyze the asymptotic directional structure and properties of gravitational field of specific exact solutions belonging to the large family of black hole spacetimes of type D found by Plebański and Demiański. We discuss the structure in the case of de Sitter (Λ>0) and anti–de Sitter (Λ<0) conformal infinity. With the aim of further interpretation, we have found the relation between the structure of the sources (the mass m, the electric e and magnetic g charges, the NUT parameter l, the rotational parameter a, the acceleration α) and the properties of radiation generated by them. In particular, we studied the amplitude of radiation and illustrated it in several figures.

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