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    Öğe
    Energy momentum of marder universe in teleparallel gravity
    (Springer/Plenum Publishers, 2007) Ayguen, Sezgin; Baysal, Huesnue; Tarhan, Ismail
    In order to evaluate the energy distribution (due to matter and fields including gravitation) associated with a space-time model of cylindrically-symmetric Marder universe, we consider the Moller, Einstein, Bergmann-Thomson and Landau-Lifshitz energy and momentum definitions in the teleparallel gravity (TG). The energy-momentum distributions are found to be zero. These results are the same as a previous works of Aygun et al., they investigated the same problem in general relativity (GR) by using the Einstein, Moller, Bergmann-Thomson, Landau-Lifshitz (LL), Papapetrou, Qadir-Sharif and Weinberg's definitions. These results support the viewpoints of Banerjee-Sen, Xulu, Radinschi and Aydogdu-Salt1. Another point is that our study agree with previous works of Cooperstock-Israelit, Rosen, Johri et al. This paper indicates an important point that these energy-momentum definitions agree with each other not only in general relativity but also in teleparallel gravity. It is also independent of the teleparallel dimensionless coupling constants, which means that it is valid not only in the teleparallel equivalent of general relativity, but also in any teleparallel model.
  • [ X ]
    Öğe
    Scalar field theory and energy-momentum problem of Yilmaz-Rosen metric in general relativity and teleparallel gravity
    (Springer, 2008) Aygun, Sezgin; Tarhan, Ismail; Baysal, Huesnue
    In this paper, using the energy momentum definitions of the Einstein, Bergmann-Thomson, Landau-Lifshitz and Moller in general relativity (GR) and teleparallel gravity (TG), we have evaluated the energy-momentum distributions of Yilmaz-Rosen metric. We have obtained that these different energy-momentum definitions give different results in GR and TG. Furthermore these results are same in different gravitation theories and we get that both general relativity and teleparallel gravity are equivalent theories for Einstein, Bergmann-Thomson and Landau-Lifshitz prescriptions. Also, while the Moller energy definitions are same and zero but the momentum prescriptions are disagree in GR and TG.