Browsing 08 Faculty of Arts and Sciences by Author "Halilsoy, Mustafa"

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Browsing 08 Faculty of Arts and Sciences by Author "Halilsoy, Mustafa"

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  • Rindler Type Acceleration in f(R) Gravity 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Modern Physics Letters A, World Scientific Publishing, 2013)
    By choosing a fluid source in f(R) gravity, defined by f(R) = R-12aξ ln|R|, where a (Rindler acceleration) and ξ are both constants, the field equations correctly yield the Rindler acceleration term in the metric. We ...
  • Scalar Plane Waves in General Relativity 
    Halilsoy, Mustafa (Lettere Al Nuovo Cimento, Societa Italiana di Fisica, 1985)
    A more general class of scalar plane waves is presented in general relativity. It is shown that no matter how the scalar field is modified, space-time possesses an essential singularity.
  • A scan of f(R) models admitting Rindler type acceleration 
    Mazharimousavi, S. Habib; Kerachian, Morteza; Halilsoy, Mustafa (European Physical Journal C: Particles and Fields, Springer, 2014)
    As a manifestation of large distance effect Grumiller modified Schwarzschild metric with an extraneous term reminiscent of Rindler acceleration. Such a term has the potential to explain the observed flat rotation curves ...
  • Screening of the Reissner–Nordström charge by a thin-shell of dust matter 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (European Physical Journal C: Particles and Fields, Springer, 2015-07)
    A concentric charged thin-shell encircling a Reissner-Nordstr\"{o}m black hole screens the clectric / magnetic charge completely to match with an external Schwarzschild black hole. The negative mass thin-shell is shown to ...
  • Search for gravitational waves through the electromagnetic Faraday rotation 
    Halilsoy, Mustafa; Gürtuğ, Özay (AMER PHYSICAL SOC, 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 impulsive ...
  • Search For Gravitational Waves Through the Electromagnetic Faraday Rotation 
    Halilsoy, Mustafa; Gürtuğ, Özay (Physical Review D, American Physical Society (APS), 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 impulsive ...
  • Similarity Solution for the Ernst Equation with Electromagnetic Fields 
    Halilsoy, Mustafa (Lettere Al Nuovo Cimento, Italian Physical Society, 1983)
    Exact similarity solution is given for the Ernst equation coupled with electromagnetic fields in general relativity.
  • Similarity Solutions for Self-Dual SU(2) Fields 
    Halilsoy, Mustafa (Physical Review D, American Physical Society (APS), 1986)
    we present new solutions to Yang's self-dual SU(2) equations. These solutions have the property that they are self-similar, together with some of their elliptical and transcendental extensions.
  • Simple System to Measure the Earth's Magnetic Field 
    Akoğlu, Reşat; Halilsoy, Mustafa; Mazharimousavi, S. Habib (Physics Teacher, American Association of Physics Teachers, 2010)
    Our aim in this proposal is to use Faraday's law of induction as a simple lecture demonstration to measure the Earths magnetic field (B). This will also enable the students to learn about how electric power is generated ...
  • Solution for Static, Spherically Symmetric Lovelock Gravity Coupled with Yang-Mills Hierarchy 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Physics Letters B, Elsevier, 2010)
    The hierarchies of both Lovelock gravity and power-Yang-Mills field are combined through gravity in a single theory. In static, spherically symmetric ansatz exact particular integrals are obtained in all higher dimensions. ...
  • Solution of Dirac equation in the near horizon geometry of an extreme Kerr black hole 
    Sakalli, Izzet; Halilsoy, Mustafa (Physical Review -Series d-, American Physical Society (APS), 2004)
    Dirac equation is solved in the near horizon limit geometry of an extreme Kerr black hole. We decouple equations first as usual, into an axial and angular part. The axial equation turns out to be independent of the mass ...
  • Solutions for f(R) gravity coupled with electromagnetic field 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Tahamtan, Tayebeh (European Physical Journal C, Springer, 2012)
    In the presence of external, linear / nonlinear electromagnetic fields we integrate f(R) \sim R+2{\alpha}\surd(R+const.) gravity equations. In contrast to their Einsteinian cousins the obtained black holes are non-asymptotically ...
  • Specific dynamics for the Domain-Walls in Einstein-Maxwell-Dilaton theory 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Classical and Quantum Gravity, Institute of Physics (IOP) Publishing, 2012)
    We consider Einstein-Maxwell-Dilaton (EMD) Lagrangian supplemented by double Liouville potentials to enrich our system and investigate the resulting dynamics. The general solution provides us alternative structures induced ...
  • 'Square Root' of the Maxwell Lagrangian versus confinement in general relativity 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Physics Letters B, Elsevier, 2012)
    We employ the 'square root' of the Maxwell Lagrangian (i.e. \surd(F_{{\mu}{\nu}}F^{{\mu}{\nu}})), coupled with gravity to search for the possible linear potentials which are believed to play role in confinement. It is found ...
  • Stability of generic cylindrical thin shell wormholes 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Amirabi, Zahra (Physical Review D, American Physical Society (APS), 2014)
    We revisit the stability analysis of cylindrical thin shell wormholes which have been studied in literature so far. Our approach is more systematic and in parallel to the method which is used in spherically symmetric thin ...
  • Stability of thin-shell wormholes supported by ordinary matter in Einstein-Maxwell-Gauss-Bonnet gravity 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Amirabi, Zahra (Physical Review D, American Physical Society (APS), 2010)
    Recently in (Phys. Rev. D 76, 087502 (2007) and Phys. Rev. D 77, 089903(E) (2008)) a thin-shell wormhole has been introduced in 5-dimensional Einstein-Maxwell-Gauss-Bonnet (EMGB) gravity which was supported by normal matter. ...
  • Stable Magnetic Universes Revisited 
    Tahamtan, Tayebeh; Halilsoy, Mustafa (Astrophysics and Space Science, Springer, 2013)
    A regular class of static, cylindrically symmetric pure magnetic field metrics is rederived in a different metric ansatz in all dimensions. Radial, time dependent perturbations show that for dimensions d>3 such spacetimes ...
  • Stable thin-shell wormholes with a Chaplygin gas in Einstein-Maxwell-Gauss-Bonnet gravity 
    Amirabi, Zahra; Halilsoy, Mustafa; Mazharimousavi, S. Habib (Physical Review D, American Physical Society (APS), 2013)
    We study the stability of thin-shell wormholes in Einstein-Maxwell-Gauss-Bonnet gravity. The equation of state of the thin shell wormhole is considered first to obey a generalized Chaplygin gas and then we generalize it ...
  • Studies in Space-Times Admitting Two Space-Like Killing Vectors 
    Halilsoy, Mustafa (Journal of Mathematical Physics, American Institute of Physics (AIP), 1988)
    Some properties of the space-times admitting two spacelike Killing vectors are studied. In particular, using harmonic maps the degree of freedom on the M' manifold is exploited to add scalar and electromagnetic fields ...
  • Test Field in sandwich Wave Space-Time 
    Halilsoy, Mustafa (Classical and Quantum Gravity, Institution of Physics (IOP) Publishing, 1997)
    Sandwich waves in the Einstein–Maxwell theory are expressed globally by introducing step functions at the boundaries. We show that a test particle crossing such a wave zone extracts energy from the sandwich wave.