Hyperon bulk viscosity in strong magnetic fields

Abstract

We study the bulk viscosity of neutron star matter including $\Lambda$ hyperons in the presence of quantizing magnetic fields. Relaxation time and bulk viscosity due to both the non-leptonic weak process involving $\Lambda$ hyperons and direct Urca processes are calculated here. In the presence of a strong magnetic field of $10^{17}$ G, the hyperon bulk viscosity coefficient is reduced whereas bulk viscosity coefficients due to direct Urca processes are enhanced compared with their field free cases when many Landau levels are populated by protons, electrons and muons.

LaTex, 28 pages including 9 figures; new results are discussed in section IV

References in corpus (41)

• A new class of unstable modes of rotating relativistic stars
• Rotating Stars in Relativity
• Hyperon-rich Matter in Neutron Stars
• Gravitational waves from hot young rapidly rotating neutron stars
• Gravitational Radiation Instability in Hot Young Neutron Stars
• Axial instability of rotating relativistic stars
• The r-mode instability in rotating neutron stars
• Discovery of a magnetar associated with the Soft Gamma Repeater SGR 1900+14
• Effects of Strong Magnetic Fields on Neutron Star Structure
• Gravitational radiation limit on the spin of young neutron stars
• Gravitational waves from instabilities in relativistic stars
• The Discovery of an Anomalous X-ray Pulsar in the Supernova Remnant Kes 73
• Quantizing magnetic field and quark-hadron phase transition in a neutron star
• Dense nuclear matter in a strong magnetic field
• Probing strange stars and color superconductivity by r-mode instabilities in millisecond pulsars
• Effect of hyperon bulk viscosity on neutron-star r-modes
• R-Mode Oscillations in Rotating Magnetic Neutron Stars
• Effects of Strong Magnetic Fields in Strange Baryonic Matter
• R-Mode Oscillations and Spindown of Young Rotating Magnetic Neutron Stars
• Bulk viscosity in superfluid neutron star cores. III. Effects of ${\Sigma }^{-}$ hyperons
• Bulk viscosity in superfluid neutron star cores. II. Modified Urca processes in $npe\mu$ matter
• R-modes of accreting hyperon stars as persistent sources of gravitational waves
• Properties of r modes in rotating magnetic neutron stars. I. Kinematic Secular Effects and Magnetic Evolution Equations
• Bulk Viscosity in Hybrid Stars
• Bulk Viscosity in Neutron Stars from Hyperons
• Bulk viscosity of strange quark matter: Urca versus non-leptonic processes
• Rapid cooling of magnetized neutron stars
• Bulk viscosity due to kaons in color-flavor-locked quark matter
• Effect of hyperon-hyperon interaction on bulk viscosity and r-mode instability in neutron stars
• Bulk viscosity in 2SC quark matter
• Bulk viscosity of spin-one color superconductors with two quark flavors
• Bulk viscosity in nuclear and quark matter: A short review
• Bulk viscosity in kaon condensed matter
• Direct Urca process in strong magnetic fields and neutron star cooling
• Hyperon bulk viscosity in the presence of antikaon condensate
• Baryon number conservation and enforced electric charge neutrality for bulk viscosity in quark matter
• Nuclear Matter in Intense Magnetic Field and Weak Processes
• Bulk viscosity of Mixed nucleon-hyperon-quark Matter in Neutron stars
• Modelling the dynamics of superfluid neutron stars
• Exotic bulk viscosity and its influence on neutron star r-modes
• Bulk Viscosity of Magnetized Neutron Star Matter

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• Coexistence of phases in asymmetric nuclear matter under strong magnetic fields
• Magnetic field generated by r-modes in accreting quark stars
• Nuclear systems under extreme conditions: isospin asymmetry and strong B-fields
• Thermal and Magnetic effects on Bulk Viscosity in Binary Neutron Star Mergers