International Journal of Astrophysics and Space Science

Volume 1, Issue 4, October 2013

  • Siva’s Equation for Singularity of Black Holes

    Siva Prasad Kodukula

    Issue: Volume 1, Issue 4, October 2013
    Pages: 16-19
    Received: Aug. 18, 2013
    Accepted:
    Published: Sep. 20, 2013
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    Abstract: Classical equation for space time and matter gives the relation between a mass and the space time surrounded by its space time fluid. Mass of the basic building block of matter creation has been termed as ‘K-Suryon’. Mass of ‘K-Suryon’ has been calculated as 1.15x10-64 kgs. The density of its space time fluid is calculated as 3.32x10626 Kg/cum. Thu... Show More
  • Change in Internal Energy & Enthalpy of the Black Holes

    Dipo Mahto, Amresh Kumar Singh, Mahendra Ram, Kumari Vineeta

    Issue: Volume 1, Issue 4, October 2013
    Pages: 20-22
    Received: Aug. 16, 2013
    Accepted:
    Published: Sep. 20, 2013
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    Abstract: The present paper derives an expression for the change in internal energy and enthalpy of the black holes using first law of thermodynamics and showing that the change in internal energy and enthalpy are the manifestations of same thing at constant pressure and volume. The paper also shows that the spinning black holes with spin a*→1 do not radiate... Show More
  • New Interpretation for Libyan Desert Glass Formation

    Samir Ahmed Hamouda, Fatma Milad Elsharif

    Issue: Volume 1, Issue 4, October 2013
    Pages: 23-28
    Received: Sep. 15, 2013
    Accepted:
    Published: Oct. 20, 2013
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    Abstract: Ever since the discovery of Libyan Desert Glass in the southwest corner of the Great Sand Sea near the Libyan border, its source of formation has become the subject of controversy that still has not been resolve. This paper introduces a general description of Libyan Desert Glass. It presents briefly different theories explaining its formation. This... Show More
  • Statistical Analysis of Associated and Non-Associated Type II Solar Radio Bursts during the Increasing Phase of Solar Cycle 23

    Vijaykumar H. Doddamani, Raveesha K. H., K. R. Subramanian

    Issue: Volume 1, Issue 4, October 2013
    Pages: 29-44
    Received: Sep. 07, 2013
    Accepted:
    Published: Oct. 20, 2013
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    Abstract: Type II and Type III bursts are probably the most intensively studied form of radio emission in all of astrophysics. Immense effort has gone into the elucidation of both the observational and theoretical aspects. The bursts have captured the attention of plasma theorists because a considerable body of information exists on the plasma parameters and... Show More
  • Frequency of Hawking Radiation of Black Holes

    Dipo Mahto, Brajesh Kumar Jha, Krishna Murari Singh, Kamala Parhi

    Issue: Volume 1, Issue 4, October 2013
    Pages: 45-51
    Received: Sep. 18, 2013
    Accepted:
    Published: Oct. 30, 2013
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    Abstract: In the present research work, we calculate the frequencies of Hawking radiations emitted from different test black holes existing in X-ray binaries (XRBs) and active galactic nuclei (AGN) by utilizing the proposed formula for the frequency of Hawking radiation f=8.037x1033kg/M(HZ)and show that these frequencies of Hawking radiations may be the comp... Show More
  • Radiative Efficiency of Black Holes in AGN

    Dipo Mahto, Rama Nand Mehta, Umakant Prasad, Raj Kumar Sah, Krishna Murari Singh

    Issue: Volume 1, Issue 4, October 2013
    Pages: 52-55
    Received: Oct. 02, 2013
    Accepted:
    Published: Oct. 30, 2013
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    Abstract: Neeraj Pant et al.(2010) gave a detailed study of BCT First solution (Tewari,1988) representing time dependent balls of perfect fluid with matter-radiation in general relativity to assume the life time of quasar 107 years, initial mass≈108M with an initial linear dimension≈1015 cm are radiating energy at a constant rate i.e. L∞=1047 ergs/sec wit... Show More
  • Study of Variation of Gravitational Constant (G) in the Very Strong Gravitational Field

    Dipo Mahto, Md Shams Nadeem, Umakant Prasad, Kumari Vineeta

    Issue: Volume 1, Issue 4, October 2013
    Pages: 56-60
    Received: Oct. 09, 2013
    Accepted:
    Published: Oct. 30, 2013
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    Abstract: In the present work, we have derived the formula for the variation of the gravitational constant given by G’=G/(1-v2/c2)-2 in very strong gravitational field of the compact bodies like super massive black holes and neutron stars applying special relativity and Newton’s law of gravitation for two bodies where v be the velocity of spinning compact b... Show More
  • Study of Variation of Temperature of Black Holes with Respect to Mass in XRBs

    Rama Nand Mehta, Umakant Prasad, Ashok Kumar, Dipo Mahto

    Issue: Volume 1, Issue 4, October 2013
    Pages: 61-63
    Received: Oct. 12, 2013
    Accepted:
    Published: Nov. 10, 2013
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    Abstract: In the present paper, we have derived an expression for the variation of temperature of the black holes with respect to mass using the temperature of black hole at which the black hole radiates to infinity all species of particles with a perfect black body spectrum and surface gravity for Schwarzschild black holes. We have also calculated their val... Show More