International Journal of Astrophysics and Space Science

Volume 3, Issue 4, August 2015

  • Nonplanar Geometry Dust – Ion Acoustic Shocks in an Adiabatic Dusty Plasma with Nonthermal Electrons

    Louis E. Akpabio, Akaninyene D. Antia

    Issue: Volume 3, Issue 4, August 2015
    Pages: 55-59
    Received: Feb. 24, 2015
    Accepted: Apr. 10, 2015
    Published: Jun. 25, 2015
    Abstract: An unmagnetized dusty plasma consisting of static negatively charged dust fluid, nonthermal distributed electrons, and adiabatic ion fluid has been considered. Basic properties of the dust-ion-acoustic shock waves have been made by the reductive perturbation method to derive the Burgers’ equation for nonplanar geometry. The solution of modified Bur... Show More
  • Evaluation of the Average Energy Density of the Electromagnetic Component of the Physical Vacuum and Quantum Nature of Gravity

    Timashev Serge

    Issue: Volume 3, Issue 4, August 2015
    Pages: 60-64
    Received: May 21, 2015
    Accepted: Jun. 11, 2015
    Published: Jul. 04, 2015
    Abstract: In the frame of the previously proposed model of the Universe dynamics (Timashev Serge. Planckian Energy-Mass Source and the Dynamics of the Universe: Phenomenology // International Journal of Astrophysics and Space Science, 2014, Vol. 2, No. 3, pp. 33-45), the substance of dark energy is associated with the electromagnetic component of the physica... Show More
  • A Derivation of the Etherington’s Distance-Duality Equation

    Yuri Heymann

    Issue: Volume 3, Issue 4, August 2015
    Pages: 65-69
    Received: Jun. 24, 2015
    Accepted: Jul. 04, 2015
    Published: Jul. 10, 2015
    Abstract: The Etherington's distance-duality equation is the relationship between the luminosity distance of standard candles and the angular-diameter distance. This relationship has been validated from astronomical observations based on the X-ray surface brightness and the Sunyaev-Zel'dovich effect of galaxy clusters. In the present study, we propose a deri... Show More