Browsing 08 Faculty of Arts and Sciences by Author "Övgün, Ali"

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Browsing 08 Faculty of Arts and Sciences by Author "Övgün, Ali"

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  • 21. yy Fiziği Sicim Teorisi; ve Maddenin Gizemi 
    Övgün, Ali (2016-01-07)
  • Black hole radiation of massive spin-2 particles in (3+1) dimensions 
    Sakallı, İzzet; Övgün, Ali (Springer, 2016-06-03)
    This paper is devoted to the study of radiation of massive spin-2 boson (graviton with a nonzero mass) through the event horizon of a generic static and spherically symmetric black hole in (3+1) dimensions. To this end, ...
  • Canonical Acoustic Thin-Shell Wormholes 
    Jusufi, Kimet; Övgün, Ali (World Scientific Publishing Co Pte Ltd, 2017-02-16)
    In this paper, we model a canonical acoustic thin-shell wormhole (CATSW) in the framework of analogue gravity systems. In this model, we apply cut and paste technique to join together two spherically symmetric, analogue ...
  • Compton Scattering 
    Övgün, Ali (University of Southampton, 2011)
  • Cosmology with Variable Physical Constants 
    Joseph, Gabriel Wirdzelii (Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ), 2020)
    The speed of light is taken to be a constant in a vacuum. This forms the basic tool for the principle of General Covariance, which asserts that, all laws of Physics should take the same form in all frames of reference. ...
  • The Dark Matter 
    Övgün, Ali (2016-01-07)
  • Dark Matter; Modification of f (R) or Wimps Miracle 
    Övgün, Ali (Eastern Mediterranean University (EMU), 2013)
    ABSTRACT: The identity of dark matter is one of the key outstanding problems in both particle and astrophysics. In this thesis, I review some candidates of dark matter, especially WIMPs (weakly interacting massive particles) ...
  • Dark Matter; Modification of F(R) or Wimps Miracle 
    Övgün, Ali (2016-01-08)
  • Dark side of the cosmos 
    Övgün, Ali (2016-01-07)
  • 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 ...
  • Gravitational Lensing Effect on the Hawking Radiation of Dyonic Black Holes 
    Sakllı, İzzet; Övgün, Ali; Mirekhtiary, S.F. (World Scientific Publishing, 2014-06-24)
    In this paper, we analyze the Hawking radiation (HR) of a non-asymptotically flat (NAF) dyonic black hole (dBH) in four-dimensional (4D) Einstein–Maxwell–Dilaton (EMD) gravity by using one of the semiclassical approaches ...
  • Gravitinos tunneling from traversable Lorentzian wormholes 
    Sakalli, İzzet; Övgün, Ali (Astrophysics and Space Science, Springer, 2015-08-19)
    Recent research shows that Hawking radiation (HR) is also possible around the trapping horizon of a wormhole. In this article, we show that the HR of gravitino (spin-3/2 ) particles from the traversable Lorentzian wormholes ...
  • GUP Assisted Hawking Radiation of Rotating Acoustic Black Holes 
    Sakallı, İzzet; Övgün, Ali; Kimet, Jusufi (Springer, 2016-09-13)
    Recent studies (Steinhauer in Nat. Phys. 10:864, 2014, Phys. Rev. D 92:024043, 2015) provide compelling evidences that Hawking radiation could be experimentally proven by using an analogue black hole. In this paper, taking ...
  • Hawking Radiation of Mass Generating Particles From Dyonic Reissner Nordström Black Hole 
    Sakallı, İzzet; Övgün, Ali (Springer, 2016-08-20)
    The Hawking radiation is considered as a quantum tunneling process, which can be studied in the framework of the Hamilton–Jacobi method. In this study, we present the wave equation for a mass generating massive and charged ...
  • Hawking Radiation of Spin-1 Particles from a Three-Dimensional Rotating Hairy Black Hole 
    Sakallı, İzzet; Övgün, Ali (Journal of Experimental and Theoretical Physics, 2015-09-27)
    We study the Hawking radiation of spin-1 particles (so-called vector particles) from a three-dimensional rotating black hole with scalar hair using a Hamilton–Jacobi ansatz. Using the Proca equation in the WKB approximation, ...
  • Inflation and Acceleration of the Universe by Nonlinear Magnetic Monopole Fields 
    Övgün, Ali (Springer, 2017-02-16)
    Despite impressive phenomenological success, cosmological models are incomplete without an understanding of what happened at the big bang singularity. Maxwell electrodynamics, considered as a source of the classical Einstein ...
  • Kütlenin Gizemi 
    Övgün, Ali (2016-01-07)
  • Massive Vector Particles Tunneling From Noncommutative Charged Black Holes and its GUP-corrected Thermodynamics 
    Övgün, Ali; Jusufi, Kimet (Springer, 2016-05-30)
    In this paper, we investigate the tunneling process of charged massive bosons W± (spin-1 particles) from noncommutative charged black holes such as charged RN black holes and charged BTZ black holes. By applying the WKB ...
  • Newtonian Cosmology 
    Zebari, Hamza Saber Saeed (Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ), 2020)
    In this work, we have used the Friedmann equation of general relativity with quantum correction terms to the Newtonian potential to obtain the modified Friedmann equation with quantum correction. The behavior of the solution ...
  • Particle Collision near 1+1-DH-LBHs 
    Övgün, Ali; Halilsoy, Mustafa (2016-01-04)
    This poster is presented in KSM2015, Frankfurt, Germany