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Browsing by Subject "Astronomical models"

Browsing by Subject "Astronomical models"

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  • Clustering of galaxies by inverse cascade in a turbulent medium 
    Krishan, V; Sivaram, C (Royal Astronomical Society, 1991-05)
    A definite physical mechanism based in inverse cascading is suggested which quite naturally yields a bottom-up hierarchical structure for galactic clustering. In this mechanism, nonlinear interactions between small fluid ...
  • Cosmic background temperature and the coupling constants of fundamental interactions 
    Sivaram, C (Kluwer Academic Publishers, 1993-08)
    The underlying links between the coupling constants of the fundamental interactions and cosmological parameters explored earlier is shown to give rise to a definite value for the cosmic background temperature.
  • High resolution spectroscopy of R Coronae Borealis during the 1988-1989 minimum 
    Lambert, D. L; Kameswara Rao, N; Giridhar, S (Indian Academy of Sciences, 1990-12)
    Moderate-resolution spectra of the C2 Swan 0-1 bandhead, the Na I D lines and the K I resonance lines near 7660 A obtained at minimum light during the 1988-1989 decline of R CrB are discussed and interpreted in terms of a ...
  • Maximum acceleration and magnetic field in the early universe 
    Sivaram, C; de Sabbata, Venzo (Kluwer Academic Publishers, 1991-02)
    The maximum acceleration at the Planck epoch is shown to be related to the maximum magnetic field and curvature as well as temperature in that era. Spin-torsion effects at that epoch also lead to same value.
  • Mutual phenomena of Jovian satellites 
    Vasundhara, R (Indian Academy of Sciences, 1991-03)
    Mutual eclipses of Galilean satellites were observed and the results are given. The observations are fitted by utilizing Lambert's law, theoretical models assuming a uniform disk, and Lommel-Seeliger's law which describes ...
  • On the tidal disruption of a spherical galaxy 
    Namboodiri, P. M. S; Kochhar, R. K (Blackwell Publishing, 1991-12)
    The disruption of a satellite galaxy as it undergoes collision with a massive perturber is investigated by numerical simulations. The models are restricted by a constant pericentric distance. The disruption of the satellite ...
  • Scale transformations and evolution of the early universe 
    Sivaram, C (Springer, 1993-09)
    The notion of discrete scale transformations is invoked to suggest strong links between fundamental interactions and cosmology giving rise to a hierarchy of cosmic scales.
  • Spin angular momentum of tidally affected galaxies 
    Namboodiri, P. M. S; Kochhar, R. K (Royal Astronomical Society, 1991-06)
    Numerical experiments have been performed to study the transfer of angular momentum to an initially non-rotating spherical galaxy as it undergoes a collision with a point mass perturber moving in a relative orbit of constant ...
  • Strengths and weaknesses of the big bang cosmology 
    Narlikar, J. V (Astronomical Society of India, 1992)
    The achievements and shortcomings of the standard hot big bang models of the universe are reviewed. The achievements lie in the predictions of the expanding universe, the abundances of light nuclei, and the MW background. ...
  • The synthesis of Al-26 during combined hydrogen and helium-burning reactions 
    Goswami, A; Ramadurai, S; Duorah, H. L (Springer Netherlands, 1992-02)
    The synthesis of Al-26 during combined hydrogen and helium-burning processes in high temperature and density conditions is studied. The possible sites for these processes are believed to be the neutron star surfaces where ...
  • Tidal change in the energy of a spherical galaxy 
    Namboodiri, P. M. S; Kochhar, R. K (Royal Astronomical Society, 1990-03)
    Tidal effects of a massive perturber on a satellite galaxy have been studied by numerical simulations. The model consists of a spherical satellite galaxy and a point-mass perturber and the encounter is non-penetrating. A ...
  • Torsion, massive electrodynamics and primordial magnetic fields in the Early Universe 
    de Andrade, L. C. G; Sivaram, C (Springer, 1993)
    A recent model of torsion-modified electrodynamics which breaks the electromagnetic conformal invariance is shown to lead to the generation of magnetic fields in the Early Universe.

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