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

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.025804· OSTI ID:21419471

Ryu, C Y; Cheoun, Myung-Ki ^[1]; Kim, K S ^[2]

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1. Department of Physics, Soongsil University, Seoul 156-743 (Korea, Republic of)
2. School of Liberal Arts and Science, Korea Aerospace University, Koyang 412-791 (Korea, Republic of)

We investigate medium effects caused by 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 causes the chemical potentials of the baryons to be large and leads to the increase of the proton fraction. Consequently, it causes the suppression of hyperons, resulting in stiffness of the equation of state. Under the presumed strong magnetic fields, we evaluate the relevant particle populations, 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.

• OSTI ID: 21419471
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevC.82.025804; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COMPARATIVE EVALUATIONS
DENSITY
EQUATIONS OF STATE
FLEXIBILITY
HYPERONS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MASS
NEUTRON STARS
PROTONS
ELEMENTARY PARTICLES
EQUATIONS
EVALUATION
FERMIONS
HADRONS
MECHANICAL PROPERTIES
NUCLEONS
PHYSICAL PROPERTIES
STARS
STRANGE PARTICLES
TENSILE PROPERTIES