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Browsing by Author "Kochhar, R. K"

Browsing by Author "Kochhar, R. K"

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  • A classification scheme for pulsars 
    Kochhar, R. K (Nature Publishing Group, 1977-11)
    The implications of a pulsar classification scheme are discussed. Three types of pulsars are distinguished - Type S (S for single) from supernova explosions of single stars; type D (D for disrupted) from binaries disrupted ...
  • Comments on `the white dwarf collapse in low mass binary systems' 
    Shylaja, B. S; Kochhar, R. K (D. Reidel Publishing Company, 1984-08)
    White dwarfs have been shown to possess high-angular momenta, in low-mass binary systems, in the context of formation of "spinars". Whether the collapse to a neutron star occurs spontaneously or is triggered by mass transfer ...
  • A correlation between ellipticity and core-strength in extended radio galaxies 
    Prabhu, T. P; Kochhar, R. K (D. Reidel Publishing Co., 1984-07)
    The authors show that in the case of extended radio sources a correlation exists between the fraction of the radio flux retained in the core component and the ellipticity of the underlying galaxy. The correlation is in the ...
  • The Density Structure of a Galaxy Influenced by a Massive Companion 
    Namboodiri, P. M. S; Kochhar, R. K (Royal Astronomical Society, 1993-04-15)
    The tidal influence of a massive galaxy on a non-rotating spherical companion is studied using numerical simulations. The simulations use various values of mass ratio and velocity of collision while the pericentric distance ...
  • The Dynamical Evolution of a Star Cluster 
    Sunder, G. S; Kochhar, R. K (International Astronomical Union, 1987)
    Using the second order tensor virial equations and the equation for the rate of change of the kinetic energy tensor, the authors follow the dynamical evolution of a star cluster with anisotropic velocity distribution. They ...
  • Energy and angular momentum transfer in binary galaxies 
    Namboodiri, P. M. S; Kochhar, R. K (NASA, 1990-11)
    The authors numerically studied tidal effects of a massive perturber on a satellite galaxy. The model consists of a spherical satellite galaxy and a point mass perturber and the encounter is non-penetrating. A wide range ...
  • Energy exchange during collision of a pair of disc-sphere galaxies 
    Namboodiri, P. M. S; Kochhar, R. K (Kluwer Academic Publishers, 1989-02)
    We have considered the collision of a pair of disc-sphere galaxies under the impulsive approximation to study the variation of the energy change of the disc due to the passage of a spherical galaxy. Various collision ...
  • French astronomers in India during the 17th - 19th centuries 
    Kochhar, R. K (British Astronomical Society, 1991-04)
    The contributions made by French astronomers from India are reviewed. The French were more successful on the scientific front than on the colonial. The first telescopic discovery from India was made by a French Jesuit ...
  • Galaxy dynamics with small computers: Some results on tidal interactions. 
    Kochhar, R. K; Namboodiri, P. M. S (Springer Netherlands, 1995-06)
    Numerical simulations with a small computer have been performed to investigate the tidal influence of a larger galaxy on a smaller companion. A criterion is developed for disruption of the satellite galaxy. The behaviour ...
  • The growth of modern astronomy in India, 1651-1960 
    Kochhar, R. K (Pergamon Press, 1991)
  • Historical notes 
    Kochhar, R. K (Indian Academy of Sciences, 1990-05-10)
  • Indian Institute of Astrophysics 
    Kochhar, R. K (1986-11)
  • Indian Institute of Astrophysics 
    Kochhar, R. K (Indian Institute of Astrophysics, 1994-01)
  • Indian Institute of Astrophysics: Facilities 
    Prabhu, T. P; Kochhar, R. K (Indian Institute of Astrophysics, 1987)
  • Leh: a high altitude site survey observatory 
    Kochhar, R. K (Indian Institute of Astrophysics, Bangalore, 1986-07)
  • Madras Observatory: buildings and instruments 
    Kochhar, R. K (Astronomical Society of India, 1985-09)
    We describe the buildings and the chief instruments of the Madras Observatory (1786-1898), the precursor of the present Indian Institute of Astrophysics through Kodaikanal Observatory.
  • Madras Observatory: The Beginning 
    Kochhar, R. K (Astronomical Society of India, 1985-06)
    We present evidence to show that the Madras Observatory-to which Indian Institute of Astrophysics (IIA) traces its origin-was formed, and observations started, in the year 1786. We also discuss how the erroneous date of ...
  • A model for the millisecond pulsar PSR 1937 + 214 
    Kochhar, R. K; Sivaram, C (Springer, 1984-01)
    The authors suggest a model for the millisecond pulsar PSR 1937+214, according to which the immediate progenitor of the pulsar was a binary consisting of two neutron stars of unequal mass. The heavier neutron star was spun ...
  • Nuclear activity and supernova occurrence 
    Kochhar, R. K (Indian Academy of Sciences, 1985)
    It is argued that the occurrence of nuclear activity and supernovae in E and S0 galaxies are correlated and a result of accretion of gas by the galaxy.
  • Obituary: M.K. Vainu Bappu 
    Kochhar, R. K; Menon, M. G. K (Astronomical Society of India, 1982-12)

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