Regular Article - Theoretical Physics
On the crustal matter of magnetars
Department of Physics, Visva-Bharati, 741 235, Santiniketan, India
Revised: 8 May 2010
Accepted: 13 May 2010
Published online: 17 June 2010
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.
© SIF, Springer-Verlag Berlin Heidelberg, 2010