Low-density instabilities in relativistic asymmetric matter of compact stars

Journal Article · Wed Feb 15 00:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.025805· OSTI ID:20771303

Providencia, C; Brito, L; Chomaz, Ph ^[1]; Avancini, S S ^[2]; Menezes, D P ^[2]

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1. Centro de Fisica Teorica, Departamento de Fisica, Universidade de Coimbra, P-3004-516 Coimbra (Portugal)
2. Depto de Fisica, CFM, Universidade Federal de Santa Catarina, Florianopolis, SC, CP. 476, CEP 88.040-900 (Brazil)

Dynamical instability modes of low-density asymmetric nuclear matter (ANM) neutralized by electrons as found in supernova core and neutron star crust are studied in the framework of relativistic mean-field hadron models with the inclusion of electron and photon fields. The dynamical and thermodynamical instability zones are compared. It is shown that the Coulomb field quenches large structure formation but has little effect on medium and small-size fluctuations that are, however, partially stabilized by the finite range of the nuclear forces. The electron dynamics tends to restore the large-wavelength instabilities but is moderated by the high-electron Fermi energy.

• OSTI ID: 20771303
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 73, Issue 2; Other Information: DOI: 10.1103/PhysRevC.73.025805; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
COULOMB FIELD
DENSITY
ELECTRONS
FLUCTUATIONS
INSTABILITY
MEAN-FIELD THEORY
NEUTRON STARS
NUCLEAR FORCES
NUCLEAR MATTER
NUCLEAR MODELS
PHOTONS
RELATIVISTIC RANGE
SUPERNOVAE
THERMODYNAMICS