Browsing Makale Koleksiyonu by Issue Date
Now showing items 120 of 27

Effect of powerlaw Maxwell field to the gravitational lensing
(APS Physics, 19992019)In this paper, we extend the gravitational bending of light studies in Kottler metrics to comprise nonlinear electrodynamics within the framework of Einstein  power  Maxwell theory. We show that the closest approach ... 
Horizon instability in the cross polarized Bell  Szekeres spacetime
(Cornell University, 2000)The quasiregular singularities (horizons) that form in the collision of cross polarized electromagnetic waves are, as in the linear polarized case, unstable. The validity of the HelliwellKonkowski stability conjecture ... 
The effect of sources on the inner horizon of black holes
(APS Physics, 2001)Single pulse of null dust and colliding null dusts both transform a regular horizon into a spacelike singularity in the space of colliding waves. The local isometry between such spacetimes and black holes extrapolates ... 
Null singularities in colliding waves
(Cornell University, 2001)Colliding Einstein  Maxwell  Scalar fields need not necessarily doomed to become in a spacelike singularity. Examples are given in which null singularities emerge as intermediate stages between a spacelike singularity ... 
Failure of a stability conjecture in general relativity
(Springerlink, 2002)By employing an exact backreaction geometry, HelliwellKonkowski stability conjecture is shown to fail. This happens when a test null dust is inserted to the interaction region of crosspolarized BellSzekeres spacetime. 
Null singularity formation by scalar fields in colliding waves and black holes
(Cornell University, 2002)It was believed that when gravitational, electromagnetic and scalar waves interact, a spacelike curvature singularity or Cauchy horizon develops because of mutual focusing. We show with an exact solution that the collision ... 
New singular and nonsingular colliding wave solutions in EinsteinMaxwellScalar theory.
(Springerlink, 2003)A technique is given to generate coupled scalar field solutions in colliding EinsteinMaxwell (EM) waves. By employing the Bell  Szekeres solution as seed and depending on the chosen scalar field, it is possible to ... 
Cosmic strings coupled with a massless scalar field
(Springerlink, 2003)A scalar field generalization of Xanthopoulos’s cylindrically symmetric solutions of the vacuum Einstein equations is obtained. The obtained solution preserves the properties of the Xanthopoulos solution, which are regular ... 
Reflection of electromagnetic waves from mixtures of plane gravitational and scalar waves
(APS Physics, 2006)We consider colliding wave packets consisting of hybrid mixtures of electromagnetic, gravitational and scalar waves. Irrespective of the scalar field, the electromagnetic wave still reflects from the gravitational wave. ... 
Search for gravitational waves through the electromagnetic faraday rotation
(APS Physics, 2007)A method is given which renders indirect detection of strong gravitational waves possible. This is based on the reflection (collision) of a linearly polarized electromagnetic shock wave from (with) a cross polarized ... 
Colliding wave solutions in a symmetric nonmetric theory
(Springerlink, 2008)A method is given to generate the nonlinear interaction (collision) of linearly polarized gravity coupled torsion waves in a nonmetric theory. Explicit examples are given in which strong mutual focussing of gravitational ... 
Generating static spherically symmetric blackholes in lovelock gravity
(WorldScientific, 2009)Generalization of a known theorem to generate static, spherically symmetric blackhole solutions in higher dimensional Lovelock gravity is presented. Particular limits, such as GaussBonnet (GB) and/or EinsteinHilbert ... 
Restricted class of colliding EinsteinYangMills plane waves
(WorldScientific, 2009)By gauging an Abelian electromagnetic (em) solution through a nonAbelian transformation and in accordance with a theorem proved long time ago, we construct a simple class of colliding EinsteinYangMills (EYM) plane ... 
Effect of NUT parameter on the analytic extension of the Cauchy horizon that develop in colliding wave spacetimes
(WorldScientific, 2009)The Cauchy horizon forming colliding wave solution due to Chandrasekhar and Xanthopoulos (CX) has been generalized by inclusion of the NUT ( Newman  Unti  Tamburino) parameter. This is done by transforming the part of ... 
2+1dimensional electrically charged black holes in Einstein  Power Maxwell Theory
(APS Physics, 2010)A large family of new black hole solutions in 2 + 1 dimensional EinsteinpowerMaxwell gravity with prescribed physical properties is derived. We show with particular examples that according to the power parameter ... 
Quantum singularities in a model of f(R) gravity
(Springerlink, 2012)The formation of a naked singularity in a model of f(R) gravity having as source a linear elec tromagnetic field is considered in view of quantum mechanics. Quantum test fields obeying the Klein−Gordon, Dirac and Maxwell ... 
Quantum singularities in (2+1) dimensional matter coupled black hole spacetimes
(APS Physics, 2012)Quantum singularities considered in the 3 D BTZ spacetime by Pitelli and Letelier (Phys. Rev. D77: 124030, 2008) is extended to charged BTZ and 3D EinsteinMaxwelldilaton gravity spacetimes. The occurence of naked ... 
Rindler modified schwarzschild geodesics
(Springerlink, 2013)The mysterious attractive constant radial force acted in the past on Pioneer spacecrafts  the socalled Pioneer anomaly  is considered within the context of Rindler acceleration. As an idea this is tempting since it ... 
A new Einsteinnonlinear electrodynamics solution in 2+1dimensions
(Springerlink, 2013)We introduce a class of solutions in 2 + 1−dimensional EinsteinPowerMaxwell theory for circularly symmetric electric field. The electromagnetic field is considered with an angular component given by Fµν = E0δ t µδ θ ν ... 
Quantum probes of timelike naked singularities in the weak eld regime of f(R) global monopole spacetime
(Springerlink, 2014)The formation of a naked singularity in f(R) global monopole spacetime is considered in view of quantum mechanics. Quantum test elds obeying the KleinGordon, Dirac and Maxwell equations are used to probe the classical ...