• M. K. Das

      Articles written in Journal of Astrophysics and Astronomy

    • 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.

    • On Out of Plane Equilibrium Points in Photo-Gravitational Restricted Three-Body Problem

      M. K. Das Pankaj Narang S. Mahajan M. Yuasa

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      We have investigated the out of plane equilibrium points of a passive micron size particle and their stability in the field of radiating binary stellar systems Krüger-60, RW-Monocerotis within the framework of photo-gravitational circular restricted three-body problem. We find that the out of plane equilibrium points (𝐿𝑖, 𝑖 = 6, 7, 8, 9) may exist for range of 𝛽1 (ratio of radiation to gravitational force of the massive component) values for these binary systems in the presence of Poynting–Robertson drag (hereafter PR-drag). In the absence of PR-drag, we find that the motion of a particle near the equilibrium points 𝐿6,7 is stable in both the binary systems for a specific range of 𝛽1 values. The PR-drag is shown to cause instability of the various out of plane equilibrium points in these binary systems.

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      Posted on January 27, 2016

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