Electromagnetic radiation from a global cosmic string in an external magnetic field

Details Electromagnetic radiation from a global cosmic string in an external magnetic field Electromagnetic radiation from a global cosmic string in an external magnetic field

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9218374h&link_type=abstract

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Astronomy and Astrophysics

Astrophysics

Astrophysics, Boson Fields, Cosmology, Electromagnetic Radiation, Electromagnetism, Magnetic Fields, Particle Theory, String Theory, Bosons, Radiation Distribution

Scientific paper

A global cosmic string may couple to electromagnetism as a consequence of anomalous triangle diagrams. In an external magnetic field, the gradients of the Nambu-Goldstone boson field around the string give rise to an extended polarization current. When the string oscillates, it radiates electromagnetic waves. We estimate the strength of the effect for representative values of astrophysical magnetic fields. We also discuss implications for axion strings if a primordial cosmological magnetic field existed at early times.

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