American Journal of Astronomy and Astrophysics

Archive

Volume 6, Issue 1, March 2018

  • About the Opportunity of Gravitational Radiation Quantum – Graviton Registration

    Andrey Nikolaevich Volobuev

    Issue: Volume 6, Issue 1, March 2018
    Pages: 1-8
    Received: 30 December 2017
    Accepted: 29 January 2018
    Published: 28 February 2018
    DOI: 10.11648/j.ajaa.20180601.11
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    Abstract: Change of a photon frequency in a constant gravitational field is examined. On the basis of Einstein’s equation a principle of the gravitational waves occurrence is investigated. The quantum form of an energy-impulse tensor is submitted. Einstein’s equation for gravitons is found. It is shown that the solution of this equation for the certain direc... Show More
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  • The Role of Time in Cosmic Expansion

    Naser Mostaghel

    Issue: Volume 6, Issue 1, March 2018
    Pages: 9-20
    Received: 22 January 2018
    Accepted: 5 February 2018
    Published: 2 March 2018
    DOI: 10.11648/j.ajaa.20180601.12
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    Abstract: By treating time as an independent variable free of space-time the role of time in cosmic expansion is clarified. We show that this treatment of time is consistent with General Relativity, and addresses the quandaries of dark or vacuum energy. We consider the current of time to be composed of many time waves. As the current flows, the number of its... Show More
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  • Study on Mass Attenuation Coefficients and Optical Properties for Boro-Tellurite Glass doped with Barium

    Heba Ali Saudi, Ghada Adel

    Issue: Volume 6, Issue 1, March 2018
    Pages: 21-25
    Received: 30 December 2017
    Accepted: 29 January 2018
    Published: 8 March 2018
    DOI: 10.11648/j.ajaa.20180601.13
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    Abstract: The influence of BaO content on the optical properties such as energy gap, refractive index, optical basicity, molar and oxide ion polarizability, molar refraction and third order nonlinear susceptibility have been studied theoretically in [0.7 TeO2 (0.3-x) B2O3 x BaO] (x =0, 0.1, 0.2, 0.3 mole%) and analyzed the parameters related to these composi... Show More
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  • The Formation and Essence of Quasars and Their Connections with Galaxies

    Cuixiang Zhong

    Issue: Volume 6, Issue 1, March 2018
    Pages: 26-30
    Received: 3 March 2018
    Accepted: 19 March 2018
    Published: 10 April 2018
    DOI: 10.11648/j.ajaa.20180601.14
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    Abstract: The discovery of quasars is one of the four great discoveries of astronomy in 1960s. Although the discovery of quasars is very interesting, but it has also brought some difficult problems for human being: are quasars stars or galaxies? Why the luminosity of the most powerful quasars is thousands of times greater than the luminosity of a large galax... Show More
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