IIA Institutional Repository

Browsing by Subject "Black Holes (Astronomy)"

Browsing by Subject "Black Holes (Astronomy)"

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  • Astrophysical consequences of barytinos 
    Sivaram, C (Springer, 1983-01)
    Some astrophysical consequences of the newly introduced barytino (massless fermions having baryon number, analogous to the massless neutrino having lepton number) are considered. It is pointed out that the existence of ...
  • Asymmetric lepton production in a universe with non-zero baryon number 
    Sivaram, C (Springer, 1982-03)
    Due to processes occurring during different stages of stellar evolution, a universe with a net baryon number develops an excess of neutrinos and positrons over antineutrinos of the same order as the observed relative ...
  • Dynamical friction and the escape of a compact supermassive object shot from the center of a galaxy 
    Kapoor, R. C (D. Reidel Publishing Company, 1985-12)
    A numerical study has been made of the motion of a compact object consisting of a supermassive black hole with a dense cluster of stars around through a galaxy which has recoiled from the center of the latter as a result ...
  • Effect of dynamical friction on the escape of a supermassive black hole from a galaxy 
    Kapoor, R. C (D. Reidel Publishing Company, 1985-05)
    We have used the impulsive approximation technique to numerically estimate the effect of dynamical friction on the motion of a supermassive black hole (mass 109 M ) through a galaxy (mass=1011 M ) which has recoiled from ...
  • Ejection of massive black holes from galaxies 
    Kapoor, R. C (Indian Academy of Sciences, 1976-11)
    Gravitational recoil of a gigantic black hole of about 10 to the 8th to 10 to the 9th solar masses formed in the nonspherical collapse of the nuclear part of a typical galaxy can take place with an appreciable speed as a ...
  • Gravitational searchlight and its astrophysical applications 
    Chitre, S. M; Narlikar, J. V; Kapoor, R. C (Nature Publishing Group, 1974-12)
    Attention is given to an interesting effect associated with light emitted in the forward direction by a source circulating in an equatorial plane around a highly collapsed object or a black hole. The emitted light received ...
  • Possible effects of positronium negative ion on 0.511 MeV gamma-ray line in astrophysical sources 
    Sivaram, C; Krishan, V (Springer, 1982-07)
    The astrophysical importance of the negative positronium ion, detected recently in the laboratory, has been pointed out. It is found that the presence of Ps(-) ions will contribute additionally to the width of the 0.511 ...
  • Re-analysis of close binary systems 
    Indulekha, K; Kundt, W; Shylaja, B. S (Kluwer Academic Publishers, 1990-10)
    The facts indicating that large line-forming regions occur among the best-studied close binaries are outlined. It is pointed out that emission lines are often redshifted while absorption lines are blueshifted, emission ...
  • Strong gravity, black holes, and hadrons 
    Sivaram, C; Sinha, K. P (American Physical Society, 1977-09)
    Certain similarities and analogies between the properties of black holes and elementary particles are considered in the framework of the strong gravitational field. Properties examined include measurable parameters (mass, ...
  • Torsion, minimum time, string tension and its physical implications in cosmology 
    de Sabbata, Venzo; Sivaram, C (Springer, 1992-01)
    By introducing torsion in general relativity - that is physically considering the effect of the spin and linking the torsion to defects in the space-time topology - a minimum unit of time can be obtained. In this context ...
  • Upper mass limit for neutron star stability against black hole formation 
    Krishan, V; Kumar, N (D.Reidel Publishing Co.,, 1978-08)
    Starting from the exact general relativistic expression for the total energy of selfgravitating spherically distributed matter and using the minimum energy principle, we calculate the upper mass limit for a neutron star ...

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