Possible conversion of a neutron star to a quark star in the presence of high magnetic field

Mallick, Ritam and Sinha, Monika (2011) Possible conversion of a neutron star to a quark star in the presence of high magnetic field. In: Monthly Notices of the Royal Astronomical Society, 414 (3). pp. 2702-2708.

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Abstract

Recent results and data suggest that high magnetic fields in neutron stars (NS) strongly affect the characteristics (radius, mass) of the star. Such stars are even separated into a class known as magnetars, for which the surface magnetic field is greater than 10(14) G. In this work we discuss the effect of such a high magnetic field on the phase transition of a NS to a quark star (QS). We study the effect of magnetic field on the transition from NS to QS including the magnetic-field effect in the equation of state (EoS). The inclusion of the magnetic field increases the range of baryon number densities for which the flow velocities of the matter in the respective phase are finite. The magnetic field helps in initiation of the conversion process. The velocity of the conversion front, however, decreases due to the presence of the magnetic field, as the presence of the magnetic field reduces the effective pressure (P). The magnetic field of the star is decreased by the conversion process, and the resultant QS has lower magnetic field than the initial NS.

Item Type:	Journal Article
Publication:	Monthly Notices of the Royal Astronomical Society
Publisher:	John Wiley and Sons
Additional Information:	Copyright of this article belongs to John Wiley and Sons.
Keywords:	equation of state;gravitation;hydrodynamics;shock waves; stars;magnetic field;stars;neutron
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	30 Aug 2011 06:49
Last Modified:	30 Aug 2011 06:49
URI:	http://eprints.iisc.ac.in/id/eprint/39955

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