Effects of the quark-hadron phase transition on highly magnetized neutron stars

Abstract

The presence of quark-hadron phase transitions in neutron stars can be related to several interesting phenomena. In particular, previous calculations have shown that fast rotating neutron stars, when subjected to a quark-hadron phase transition in their interiors, could give rise to the backbending phenomenon characterized by a spin-up era. In this work, we use an equation of state composed of two phases, containing nucleons (and leptons) and quarks. The hadronic phase is described in a relativistic mean field formalism that takes many-body forces into account, and the quark phase is described by the MIT bag model with a vector interaction. Stationary and axi-symmetric stellar models are obtained in a self-consistent way by solving numerically the Einstein-Maxwell equations by means of a pseudo-spectral method. As a result, we obtain the interesting backbending phenomenon for fast spinning neutron stars. More importantly, we show that a magnetic field, which is assumed to be axi-symmetric and poloidal, can also be enhanced due to the phase transition from normal hadronic matter to quark matter on highly magnetized neutron stars. Therefore, in parallel to the spin-up era, classes of neutron stars endowed with strong magnetic fields may go through a "magnetic-up era" in their lives.

Monthly Notices of the Royal Astronomical Society 2016

References in corpus (13)

• Equation of State of a Dense and Magnetized Fermion System
• Consistent neutron star models with magnetic field dependent equations of state
• Effects of color superconductivity on the nucleation of quark matter in neutron stars
• Phase transitions in rotating neutron stars cores: back bending, stability, corequakes and pulsar timing
• Many-body forces in the equation of state of hyperonic matter
• Braking Index of Isolated Pulsars
• Repulsive Vector Interaction in Three Flavor Magnetized Quark and Stellar Matter
• The role of strangeness in hybrid stars and possible observables
• Lepton effects on the proto-neutron stars with the hadron-quark mixed phase in the Nambu-Jona-Lasinio model
• On magnetic equilibria in barotropic stars
• Dynamical Generation of a Repulsive Vector Contribution to the Quark Pressure
• Strong first-order phase transition in a rotating neutron star core and the associated energy release
• Hadron-Quark Phase Transition in Quark-Hybrid Stars

Cited by in corpus (8)

• The Dipole Magnetic Field and Spin-down Evolutions of The High Braking Index Pulsar PSR J1640-4631
• Limiting magnetic field for minimal deformation of a magnetised neutron star
• Vector dark boson mediated feeble interaction between fermionic dark matter and strange quark matter in quark stars
• Compact star merger events with stars composed of interacting strange quark matter
• AR Scorpii and possible gravitational wave radiation from pulsar white dwarfs
• Neutron star inner crust: effects of rotation and magnetic fields
• Spin-down induced quark-hadron phase transition in cold isolated neutron stars
• Phase transitions and latent heat in magnetized matter