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On the crustal matter of magnetars

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Abstract.

We have investigated some of the properties of dense sub-nuclear matter at the crustal region (both the outer crust and the inner crust region) of a magnetar. The relativistic version of the Thomas-Fermi (TF) model is used in the presence of a strong quantizing magnetic field for the outer crust matter. The compressed matter in the outer crust, which is a crystal of metallic iron, is replaced by a regular array of spherically symmetric Wigner-Seitz (WS) cells. In the inner crust region, a mixture of iron and heavier neutron-rich nuclei along with electrons and free neutrons has been considered. Conventional Harrison-Wheeler (HW) and Bethe-Baym-Pethick (BBP) equation of states are used for the nuclear mass formula. A lot of significant changes in the characteristic properties of dense crustal matter, both at the outer crust and at the inner crust, have been observed.

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Authors and Affiliations

  1. Department of Physics, Visva-Bharati, 741 235, Santiniketan, India

    Nandini Nag, Sutapa Ghosh & Somenath Chakrabarty

Authors
  1. Nandini Nag
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  2. Sutapa Ghosh
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  3. Somenath Chakrabarty
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Communicated by J. Wambach

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Nag, N., Ghosh, S. & Chakrabarty, S. On the crustal matter of magnetars. Eur. Phys. J. A 45, 99–110 (2010). https://doi.org/10.1140/epja/i2010-10992-0

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