• V. B. Bhatia

      Articles written in Journal of Astrophysics and Astronomy

    • Gamma-ray emission from pulsars

      V. B. Bhatia S. Mishra N. Panchapakesan

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      We have attempted to devise a scheme by which it may be possible to identify pulsars which are likely to be γ-ray pulsars. We apply this test to a representative population of pulsars and identify the likely candidates for γ emission. We also discuss some individual cases including the Crab and Vela pulsars.

    • Globular clusters as gamma ray sources

      V. B. Bhatia S. Mishra N. Panchapakesan

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      There are indications now that globular clusters contain a large number of low magnetic field millisecond pulsars. Since millisecond pulsars are expected to emit γ-rays due to curvature radiation, it is likely that globular clusters will themselves be sources of γ-rays bright enough to be detectable by present day instruments. Using the expression derived by Scharlemann, Arons & Fawley (1978) of the energy acquired by the electrons moving along the open magnetic field lines of the pulsars we have calculated the likely luminosity of γ-rays from globular clusters. We discuss our results in the light of the calculations reported in the literature based on some of the other models.

    • Statistical response of randomly excited nonlinear radial oscillations in polytropes

      Anunay K. Chaudhary V. B. Bhatia M. K. Das R. K. Tavakol

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      The effect of internal noise on the response characteristics of nonlinear radial pulsation in polytropic model has been investigated using the equivalent linearization technique. The model of the noise is taken to be δ-correlated with zero mean. Both non-stationary and stationary response characteristics have been computed for various nonlinearity parameters in different polytropes.

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      Posted on January 27, 2016

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