Yazar "Kiy, Guliz" seçeneğine göre listele

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    Energy and Momentum of Higher Dimensional Black Holes
    (Springer/Plenum Publishers, 2012) Dogru, Melis Ulu; Varlikli, Neriman; Baykal, Derya; Kiy, Guliz; Taser, Dogukan; Caglar, Halife; Gunduz, Emine
    In this paper, we devote to investigate the energy-momentum problem of higher dimensional black holes in the general theory of relativity. The energy and momentum complex of Moller has been used for the calculations. Also, total energy and total momentum of some special cases for higher dimensional black holes such as Schwarzschild-like black holes, Reissner-Nordstrom-like charged black holes, AdS-like black holes, topological black holes, BTZ-like and charged BTZ-like black holes were obtained. It is invented that the momentum of black holes vanishes everywhere while the energy of black holes are not equal to zero in higher dimension. Also the results agree with Yang and Radinschi or Vagenas results in three and four dimensional black holes, respectively (Jang and Radinschi in AIP Conf. Proc. 895, 325, 2007; Vagenas in Mod. Phys. Lett. A 21, 1947, 2006).
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    ENERGY-MOMENTUM DISTRIBUTIONS OF FIVE-DIMENSIONAL HOMOGENEOUS-ANISOTROPIC UNIVERSES
    (World Scientific Publ Co Pte Ltd, 2012) Dogru, Melis Ulu; Baykal, Derya; Kiy, Guliz; Taser, Dogukan; Caglar, Halife; Varlikli, Neriman
    In this study, it has been investigated whether the energy and momentum can be localizable for five-dimensional homogeneous and anisotropic universes. In this connection, energy and momentum of five-dimensional Bianchi type-I, type-III and type-V spacetimes have been calculated in the framework of general relativity (GR) and teleparallel gravity (TG). Einstein, Bergmann-Thomson, Landau-Lifshitz, Papapetrou, Tolman and Moller energy-momentum complexes have been used to obtain these related quantities of given the spacetimes in GR, while Einstein, Bergmann-Thomson, Landau-Lifshitz and Moller prescriptions have been used to obtain these related quantities of the spacetimes in TG. It has been found that all of the energy and momentum distributions of five-dimensional Bianchi type-I spacetime are equal to zero in GR and TG. For five-dimensional Bianchi type-III and type-V spacetimes, Bergmann-Thomson, Einstein and Tolman energy and momentum components give the same results, however Moller, Landau-Lifshitz and Papapetrou energy-momentum distributions give different results in general relativity. Also, in TG, Bergmann-Thomson and Einstein energy and momentum components give the same results for the Bianchi type-III and type-V spacetimes, too. In this sense, it is seen that Einstein, Bergmann-Thomson and Landau-Lifshitz energy and momentum descriptions of these spacetimes have been given same results in both theories, GR and TG.
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    Öğe
    Higher-dimensional energy-momentum problem for Bianchi types V and I universes in gravitation theories
    (World Scientific Publ Co Pte Ltd, 2015) Kiy, Guliz; Aygun, Sezgin
    Using the Einstein, Bergmann-Thomson, Landau-Lifshitz, Moller, Papapetrou and Tolman energy-momentum complexes in general relativity (GR) and teleparallel gravity (TG), we calculate the total energy-momentum distributions associated with N-dimensional Bianchi type V universe. While the solutions of Einstein, Bergmann-Thomson and Tolman energy and momentum densities are the same as each other, the solutions of Landau-Lifshitz, Moller and Papapetrou energy-momentum densities are different for N-dimensional Bianchi type V space-time in GR and TG. Obtained results for Einstein, Bergmann-Thomson and Landau-Lifshitz definitions we could say that GR and TG are in the same class. Because different energy-momentum distributions provide same results. However we have discussed N-dimensional Bianchi type I solutions and then we obtained all energy-momentum solutions are vanish in GR and TG theories. These results agree with Banerjee-Sen, Xulu, Aydogdu-Salti and Radinschi in four dimensions.