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    • Neutron Stars: Laboratories for Fundamental Physics Under Extreme Astrophysical Conditions

      Debades Bandyopadhyay

      Review Article Volume 38 Issue 3 September 2017 Article ID 0037

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/038/03/0037

    • Keywords

       

      Neutron stars; equations of state; magnetic fields.

    • Abstract

       

      We discuss different exotic phases and components of matter from the crust to the core of neutron stars based on theoretical models for equations of state relevant to core collapse supernova simulations and neutron star merger. Parameters of the models are constrained from laboratory experiments. It is observed that equations of state involving strangeness degrees of freedom such as hyperons and Bose–Einstein condensates are compatible with $2{M}_{\mathrm{solar}}$ neutron stars. The role of hyperons is explored on the evolution and stability of the protoneutron star in the context of SN1987A. Moment of inertia, mass and radius which are direct probes of neutron star interior are computed and their observational consequences are discussed. We continue our study on the dense matter under strong magnetic fields and its application to magnetoelastic oscillations of neutron stars.

    • Author Affiliations

       

      Debades Bandyopadhyay1

      1. Astroparticle Physics and Cosmology Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064, India.

    • Dates

       
      Published
      13 September 2017
      Manuscript received
      4 May 2017
      Accepted
      6 June 2017

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