1997/11/30 by L. B. Leinson, Lev B Leinson, A. Perez +1 · 30 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Degenerate energy levels #Electron #Field (mathematics) #Magnetic field #Neutron #Neutron star #Proton #Pulsars and Gravitational Waves Research #Scientific Research and Discoveries #astro-ph #hep-ph
paper · pdf · doi:10.1088/1126-6708/1998/09/020
published in Journal of High Energy Physics 1998(09), 020 (Springer Nature) · 9 pages, 3 figures
arxiv created 1998/05/25 · openalex publication_date 1998/09/25 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We calculate the emissivity for the direct URCA process in strongly magnetized, degenerate matter in neutron stars, under β-equilibrium. We show that, if the magnetic field is large enough for protons and electrons to be confined to the ground Landau levels, the field-free threshold condition on proton concentration no longer holds, and direct URCA reactions are open for an arbitrary proton concentration. Direct URCA process leads to an early phase of fast neutron star cooling. This circumstance allows us to constrain the initial magnetic field inside observed pulsars.