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    • Relativistic Disc Line: A Tool to Constrain Neutron Star Equation of State Models

      Sudip Bhattacharyya

      Review Article Volume 38 Issue 3 September 2017 Article ID 0038

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/038/03/0038

    • Keywords

       

      Accretion; accretion discs; equation of state; methods: numerical; stars: neutron; X-rays: binaries.

    • Abstract

       

      Relativistic iron Kα spectral emission line from the inner disc of a neutron star Low-Mass X-ray Binary (LMXB) was first detected in 2007. This discovery opened up new ways to probe strong gravity and dense matter. The past decade has seen detections of such a line from many neutron star LMXBs, and confirmation of this line from the same source with several X-ray satellites. These have firmly established the new field of relativistic disc line from neutron star systems in only a decade or so. Fitting the shape of such a line with an appropriate general relativistic model provides the accretion disc inner edge radius to the stellar mass ratio. In this review, we briefly discuss how an accurate measurement of this ratio with a future larger area X-ray instrument can be used to constrain neutron star equation of state models.

    • Author Affiliations

       

      Sudip Bhattacharyya1

      1. Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005, India.

    • Dates

       
      Published
      13 September 2017
      Manuscript received
      2 May 2017
      Accepted
      12 May 2017

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