From microphysics to dynamics of magnetars

5th Compact Stars in the QCD Phase Diagram

Sedrakian, Armen^1,5 ; Huang, Xu-Guang^2 ; Sinha, Monika^3 ; Clark, John W.^4,6

Frankfurt Institute for Advanced Studies, Frankfurt-Main

D-60438, Germany^1

Physics Department, Center for Particle Physics and Field Theory, Fudan University, Shanghai

200433, China^2

Indian Institute of Technology Rajasthan, Old Residency Road, Ratanada, Jodhpur

342011, India^3

Department of Physics, McDonnell Center for the Space Sciences, Washington University, St. Louis

MO

63130, United States^4

Institute for Theoretical Physics, J. W. Goethe-University, Frankfurt-Main

D-60438, Germany^5

Centro de Ciências Matemáticas, University of Madeira, Funchal

9000-390, Portugal^6

关键词: Critical magnetic field;    Diamagnetic currents;    Ginzburg-Landau;    Microphysics;    Neutron spins;    Pauli paramagnetism;    S-wave pairing;    Thermal evolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/861/1/012025/pdf
DOI  :  10.1088/1742-6596/861/1/012025

来源: IOP

【 摘 要 】

MeV-scale magnetic fields in the interiors of magnetars suppress the pairing of neutrons and protons in the S-wave state. In the case of a neutron condensate the suppression is the consequence of the Pauli-paramagnetism of the neutron gas, i.e., the alignment of the neutron spins along the magnetic field. The proton S-wave pairing is suppressed because of the Landau diamagnetic currents of protons induced by the field. The Ginzburg-Landau and BCS theories of the critical magnetic fields for unpairing are reviewed. The macrophysical implications of the suppression (unpairing) of the condensates are discussed for the rotational crust-core coupling in magnetars and the neutrino-dominated cooling era of their thermal evolution.