Medium effects of magnetic moments of baryons on neutron stars under strong magnetic fields

Abstract

We investigate medium effects due to density-dependent magnetic moments of baryons on neutron stars under strong magnetic fields. If we allow the variation of anomalous magnetic moments (AMMs) of baryons in dense matter under strong magnetic fields, AMMs of nucleons are enhanced to be larger than those of hyperons. The enhancement naturally affects the chemical potentials of baryons to be large and leads to the increase of a proton fraction. Consequently, it causes the suppression of hyperons, resulting in the stiffness of the equation of state. Under the presumed strong magnetic fields, we evaluate relevant particles' population, the equation of state and the maximum masses of neutron stars by including density-dependent AMMs and compare them with those obtained from AMMs in free space.

References in corpus (6)

• Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions
• Quark-hadron phase transition in a neutron star under strong magnetic fields
• Properties of hyperonic matter in strong magnetic fields
• Neutron star matter in the quark-meson coupling model in strong magnetic fields
• Electromagnetic form factors of bound nucleons revisited
• Magnetic moment of hyperons in nuclear matter by using quark-meson coupling models

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