Browsing by Author "Chakraborty, Subenoy"

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    Motion of test particle around monopoles
    (2015-02-07) Chakraborty, Subenoy
    We present a detail analysis of the motion of test particles around gauge and global monopoles using the Hamilton-Jacabi (H-J) formalism. We find that particles cannot be trapped by gauge monopoles while there may exist bound orbits for global monopoles under certain conditions.
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    Role of Modified Chaplygin Gas in Accelerated Universe
    (2011-07-06) Debnath, Ujjal; Banerjee, A.; Chakraborty, Subenoy
    In this paper we have considered a model of modified Chaplygin gas and its role in accelerating phase of the universe. We have assumed that the equation of state of this modified model is valid from the radiation era to ΛCDM model. We have used recently developed statefinder parameters in characterizing different phase of the universe diagrammatically.
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    String cosmology in a stationary cylindrically symmetric space-time
    (2015-02-07) Chakraborty, Subenoy
    A one parameter family of salutation are obtained for string cosmology in a stationary symmetric space-time.