Rearrangement of the Fermi Surface of Dense Neutron Matter and the Direct Urca Cooling of Neutron Stars | Zendy

D. N. Voskresensky | Zendy; V. A. Khodel | Zendy; M. V. Zverev | Zendy; J. W. Clark | Zendy

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Rearrangement of the Fermi Surface of Dense Neutron Matter and the Direct Urca Cooling of Neutron Stars

Author(s) -

D. N. Voskresensky,

V. A. Khodel,

M. V. Zverev,

J. W. Clark

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312607

Subject(s) - neutron star , physics , isospin , fermi gamma ray space telescope , nucleon , nuclear physics , neutron , softening , realization (probability) , pion , nuclear matter , condensation , degrees of freedom (physics and chemistry) , astrophysics , quantum mechanics , statistics , mathematics , thermodynamics

It is proposed that a rearrangement of single-particle degrees of freedom may occur in a portion of the quantum-fluid interior of a neutron star. Such a rearrangement is associated with the pronounced softening of the spin-isospin collective mode which, under increasing density, leads to pion condensation. Arguments and estimates based on fundamental relations of many-body theory show that one realization of this phenomenon could produce very rapid cooling of the star via a direct nucleon Urca process displaying a T5 dependence on temperature.

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