Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991sci...251.1033h&link_type=abstract
Science (ISSN 0036-8075), vol. 251, March 1, 1991, p. 1033-1038.
Astronomy and Astrophysics
Astrophysics
22
Neutron Stars, Stellar Magnetic Fields, Cyclotron Radiation, Pair Production, Positron Annihilation, Resonance Scattering, Scattering Cross Sections, Stellar Rotation
Scientific paper
Electromagnetic phenomena occurring in the strong magnetic fields of neutron stars are currently of great interest in high-energy astrophysics. Observations of rotation rate changes and cyclotron lines in pulsars and gamma-ray bursts indicate that surface magnetic fields of neutron stars often exceed a trillion gauss. In fields this strong, where electrons behave much as if they were in bound atomic states, familiar processes undergo profound changes, and exotic processes become important. Strong magnetic fields affect the physics in several fundamental ways: energies perpendicular to the field are quantized, transverse momentum is not conserved, and electron-positron spin is important. Neutron stars therefore provide a unique laboratory for the study of physics in extremely high fields that cannot be generated on earth.
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