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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  • Existence of traversable wormholes in the spherical stellar systems 
    Övgün, Ali; Halilsoy, Mustafa (Springer, 2016-05-27)
    Potentiality of the presence of traversable wormholes in the outer/inner regions of the halos of galaxies, situated on the Navarro-Frenk-White (NFW) density profile and Universal Rotation Curve (URC) dark matter models ...
  • Fading Hawking Radiation 
    Sakallı, İzzet; Halilsoy, Mustafa; Paşaoğlu, Hale (Astrophysics and Space Science, Springer, 2012)
    In this study, we explore a particular type Hawking radiation which ends with zero temperature and entropy. The appropriate black holes for this purpose are the linear dilaton black holes. In addition to the black hole ...
  • Flare-out conditions in static thin-shell wormholes 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Physical Review D, American Physical Society (APS), 2014)
    We reconsider the generalized flare-out conditions in static wormhole throats given by Hochberg and Visser. We show that due to the presence of matter sources on the throat, these conditions are not applicable to the ...
  • Generating Static Spherically Symmetric Black-holes in Lovelock Gravity 
    Mazharimousavi, S. Habib; Gürtuğ, Özay; Halilsoy, Mustafa (International Journal of Modern Physics D, World Scientific Publishing, 2009)
    Generalization of a known theorem to generate static, spherically symmetric black-hole solutions in higher dimensional Lovelock gravity is presented. Particular limits, such as Gauss-Bonnet (GB) and/or Einstein-Hilbert ...
  • Ground State H-Atom in Born-Infeld Theory 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Foundations of Physics, Springer, 2012)
    Within the context of Born-Infeld (BI) nonlinear electrodynamics (NED) we revisit the non-relativistic, spinless H-atom. The pair potential computed from the Born-Infeld equations is approximated by the Morse type potential ...
  • Higher dimensional thin-shell wormholes in Einstein-Yang-Mills-Gauss-Bonnet gravity 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Amirabi, Zahra (Classical and Quantum Gravity, Institute of Physics (IOP) Publishing: Hybrid Open Access - Green Policies in RoMEO, 2011)
    We present thin-shell wormhole solutions in Einstein-Yang-Mills-Gauss-Bonnet (EYMGB) theory in higher dimensions d\geq5. Exact black hole solutions are employed for this purpose where the radius of thin-shell lies outside ...
  • Higher dimensional Yang-Mills black holes in third order Lovelock gravity 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Physics Letters B, Elsevier, 2008)
    By employing the higher (N\TEXTsymbol{>}5) dimensional version of the Wu-Yang Ansatz we obtain magnetically charged new black hole solutions in the Einstein-Yang-Mills-Lovelock (EYML) theory with second (α2) and third ...
  • Hypocycloidal throat for 2+1-dimensional thin-shell wormholes 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (The European Physical Journal C, Springer, 2015-11-19)
    Recently we have shown that for 2+1−dimensional thin-shell wormholes a non-circular throat may lead to a physical wormhole in the sense that the energy conditions are satisfied. By the same token, herein we consider angular ...
  • Interacting Electromagnetic Shock Waves in General Relativity 
    Halilsoy, Mustafa (Nuovo Cimento B, Societa Italiana di Fisica, 1987)
    We study the interacting electromagnetic shock waves with nonconstant profiles in general relativity. It is shown that by modifying the metric functions of the Bell-Szekeres solution, such solutions can be obtained.
  • Interacting Superposed Electromagnetic Shock Plane "Waves in General Relativity 
    Metin, Gürses; Halilsoy, Mustafa (Lettere Al Nuovo Cimento, Italian Physical Society, 1982)
    We present a solution of the Einstein-Maxwell field equations describing the collision of superposed electromagnetic shock plane waves
  • Interpolation of the schwarzschild and Bertotti-Robinson solutions 
    Halilsoy, Mustafa (General Relativity and Gravitation, Springer, 1993)
    The two well-known solutions of general relativity, the Schwarzschild and the Bertotti-Robinson solutions, are shown to be described by a common metric. In a particular coordinate system we show the connection between ...
  • Lovelock black holes with a power-Yang-Mills source 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Physics Letters B, Elsevier, 2009)
    We consider the standard Yang-Mills (YM) invariant raised to the power q, i.e., (F(a)μνF(a)μν)q as the source of our geometry and investigate the possible black hole solutions. How does this parameter q modify the black ...
  • Lovelock black holes with a power-Yang–Mills source 
    Mazharimousavi, Seyed Habib; Halilsoy, Mustafa (Elsevier B.V, 2009)
    We consider the standard Yang–Mills (YM) invariant raised to the power q , i.e., View the MathML source as the source of our geometry and investigate the possible black hole solutions. How does this parameter q modify the ...
  • A Method for Generating New Solutions in General Relativity 
    Halilsoy, Mustafa (Physics Letters A, Elsevier, 1981)
    We present another method of generating new solutions from old ones in general relativity. In particular we apply the method to some well-known classes of gravitational fields.
  • Metric for a Static Mass Coupled to Stationary EM Field 
    Halilsoy, Mustafa; Al-Badawi, A (Classical and Quantum Gravity, Institute of Physics (IOP) Publishing, 1995)
    We present the metric of a Schwarzschild (S) black hole coupled to an external, stationary electromagnetic Bertotti–Robinson (BR) solution. This metric generalizes a previous metric that served to unify the S and BR ...
  • Microscopic thin shell wormholes in magnetic Melvin universe 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Amirabi, Zahra (European Physical Journal C: Particles and Fields, Springer, 2014)
    We construct thin shell wormholes in the magnetic Melvin universe. It is shown that in order to make a TSW in the Melvin spacetime the radius of the throat can not be larger than 2B0 in which B0 is the magnetic field ...
  • Modified Rindler acceleration as a nonlinear electromagnetic effect 
    Halilsoy, Mustafa; Gürtuğ, Özay; Mazharimousavi, S. Habib (Astroparticle Physics, Elsevier, 2015)
    The model proposed originally by Mannheim and Kazanas for fitting the shapes of galactic rotation curves has recently been considered by Grumiller to describe gravity of a central object at large distances. Herein we employ ...
  • Modified RN Metric in an External Electrostatic Field 
    Halilsoy, Mustafa; Al-Badawi, A. (Nuovo Cimento B, Springer, 1998)
  • N-Dimensional non-abelian dilatonic, stable black holes and their Born-Infeld extension 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Amirabi, Zahra (General Relativity and Gravitation, Springer, 2009)
    We find large classes of non-asymptotically flat Einstein-Yang-Mills-Dilaton (EYMD) and Einstein-Yang-Mills-Born-Infeld-Dilaton (EYMBID) black holes in N-dimensional spherically symmetric spacetime expressed in terms of ...
  • A new Einstein-nonlinear electrodynamics solution in 2+1-dimensions 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Gürtuğ, Özay (European Physical Journal C: Particles and Fields, Springer, 2014)
    We introduce a class of solutions in 2+1−dimensional Einstein-Power-Maxwell theory for circularly symmetric electric field. The electromagnetic field is considered with an angular component given by $% F_{\mu \nu ...