Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Khanal, U. P."'
Autor:
Poudel, P. C., Khanal, U.
In the present work, geodesic trajectories in Kerr-de Sitter geometry is analyzed. From the mathematical solution of Lagrangian formalism appropriate to motions in the equatorial plane (for which 'theta' = 0 and 'theta' = (constant)= pi/2) can give p
Externí odkaz:
http://arxiv.org/abs/1309.1685
Some solutions of the Maxwell equations with Dirac particles for the source in FRW spacetime are discussed. The Green's function of the equation for the radial component of the Maxwell fields, F_{r\eta} and F_{\theta\phi} is solved. Green's function
Externí odkaz:
http://arxiv.org/abs/1307.5443
An expression for rotational velocity of a test particle around the central mass in the invariant plane is derived. For this, a line element of Schwarzschild de-Sitter space-time is used to study the effect of cosmological constant ($\Lambda$) on the
Externí odkaz:
http://arxiv.org/abs/1307.1824
Jeans mass calculated with different combination of parameters involved has shown interesting variation with remarkable shifting of position of peak value from x = m/T = 0.5 to 5.5. The standard deviation is 2.217. In particular, using the harmonic m
Externí odkaz:
http://arxiv.org/abs/1201.0151
Autor:
Sharma, S. K., Khanal, U.
Publikováno v:
International Journal of Modern Physics D, Vol. 23, No. 1 (2014) 1450017
Perturbation of FRW spacetime is carried out in NP formalism. The equation governing the scalar, vector and tensor modes take on a very simple and transparent form. All of them can be combined in one master equation for all helicities. The solutions
Externí odkaz:
http://arxiv.org/abs/1109.6411
Autor:
Dhungel, P. R., Khanal, U.
Publikováno v:
Chinese Journal of Physics, VOL. 51, NO. 5, October 2013
The behaviour of the Dirac field in FRW space-time is investigated. The relevant equations are solved to determine the particle and energy distribution. The angular and radial parts are solved in terms of Jacobi polynomials. The time dependence of th
Externí odkaz:
http://arxiv.org/abs/1109.6412
Autor:
Khanal, U.
Publikováno v:
Class.Quant.Grav.23:4353,2006
Maxwell and Dirac fields in Friedmann-Robertson-Walker spacetime is investigated using the Newman-Penrose method. The variables are all separable, with the angular dependence given by the spin-weighted spherical harmonics. All the radial parts reduce
Externí odkaz:
http://arxiv.org/abs/astro-ph/0508566
Autor:
Khanal, U.
The Einstein-Hilbert worldspace action is used to investigate the dynamics of extended object. In the Robertson-Walker worldspace, this is seen to introduce a pressureless density which could contribute to dark matter. Such pressureless energy densit
Externí odkaz:
http://arxiv.org/abs/astro-ph/0410634
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