Neutrino-pair emission in a strong magnetic field

ENE van Dalen*, AEL Dieperink, A Sedrakian, RGE Timmermans

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

We study the neutrino emissivity of strongly magnetized neutron stars due to the charged and neutral current couplings of neutrinos to baryons in strong magnetic fields. The leading order neutral current process is the one-body neutrino-pair bremsstrahlung, which does not have an analogue in the zero field limit. The leading order charged current reaction is the known generalization of the direct Urea processes to strong magnetic fields. While for superstrong magnetic fields in excess of 10(18) G the direct Urea process dominates the one-body bremsstrahlung, we find that for fields on the order 10(16) - 10(17) G and temperatures a few times 10(9) K the one-body bremsstrahlung is the dominant process. Numerical computation of the resulting emissivity, based on a simple parametrization of the equation of state of the npe-matter in a strong magnetic field, shows that the emissivity of this reaction is of the same order of magnitude as that of the modified Urea process in the zero field limit.

Original languageEnglish
Pages (from-to)549-558
Number of pages10
JournalAstronomy & astrophysics
Volume360
Issue number2
Publication statusPublished - 10-Aug-2000

Keywords

  • stars : neutron
  • stars : evolution
  • stars : magnetic fields
  • X-RAY PULSAR
  • DIRECT URCA PROCESS
  • PARITY VIOLATION
  • DENSE MATTER
  • STARS
  • EQUATION
  • STATE

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