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On a possible mechanism of low surface magnetic field structure of quark stars
Authors:Nandini Nag  Sutapa Ghosh  Roni Saha  Somenath Chakrabarty
Institution:(1) Department of Physics, Visva-Bharati, Santiniketan, 731 235, India
Abstract:Following some of the recent articles on hole super-conductivity and related phenomena by Hirsch (Phys. Lett. A 134:451, 1989; Phys. Rev. B 68:184502, 2003a; Phys. Rev. B 71:184521, 2005a and Phys. Lett. A 345:453, 2005b) a simple model is proposed to explain the observed low surface magnetic field of the expected quark stars. It is argued that the diamagnetic moments of the electrons circulating in the electro-sphere induce a magnetic field, which forces the existing quark star magnetic flux density to become dilute. For the sake of completeness, we have also included the analyses of instability at the normal-super-conducting interface due to excess accumulation of magnetic flux lines. The instability at the interface has also been studied numerically.
Keywords:Quark star  Magnetic field  Superconductivity  Mullins-Sekerka instability  Hole theory  Magnetic circuit
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