Research Papers (JVN)

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Author: search.filters.author.Subramanian, KandaswamySubject: search.filters.subject.Quasars

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    Statistical significance of a large quasar inhomogeneity in the sky
    (EDP Sciences, 1985-05-09) Narlikar, J. V.; Subramanian, Kandaswamy
    Statistical techniques are devised to study the significance of apparent inhomogeneities in the distribution of points on a spherical surface, especially in the form of jets and chains. The methods are applied to complete samples of radio quasars in specific windows of magnitudes and redshifts. It is found that while most of the distributions studied show very little evidence of non-randomness, the inhomogeneity reported by Arp (1984) is highly significant. There is also some evidence, although a statistically weaker one, for a chainlike structure in the distribution of low redshift quasars in another area of the sky.
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    Single exhaust model for backward emission in fast moving quasars
    (Liege University Press, Liege, 1983-01-01) Subramanian, Kandaswamy; Narlikar, J. V.
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    Quasars Q 2345 + 007 A,B and 3C 273 : Gravitational Lenses?
    (Liege University Press, Liege, 1983-01-14) Narlikar, J. V.; Subramanian, Kandaswamy; Narasimha, D.; et al.
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    Single exhaust model for backward emission in doppler quasars
    (American Astronomical Society, 1983-10-01) Narlikar, J. V.; Subramanian, Kandaswamy
    This paper provides an astrophysical scenario for Hoyle's (1980) conjecture that quasars ejected at high velocities from active galactic nuclei predominantly radiate in a narrow backward cone. Through such backward emission, local Doppler theory can explain the fact that no blueshifted quasars are seen. It is held that a fast moving quasar encounters a strong ram pressure from the intergalactic medium in the forward direction which suppresses the forward exhaust. Attention is given to the hydrodynamic, gravitation theory, and radiation requirement constraints on the model, which is shown to accommodate them over a comfortable range of parameters, and which also helps in the understanding of some of the observable properties of quasars.
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    Observational limitations of the Doppler theory of quasars
    (American Astronomical Society, 1982-09-13) Narlikar, J. V.; Subramanian, Kandaswamy