Lower bound on the local extragalactic magnetic field
Abstract
Assuming that the hard γ-ray emission of Cen A is a result of synchrotron radiation of ultrarelativistic electrons, we derive a lower bound on the local extragalactic magnetic field, B>10-8 G. This result is consistent with (and close to) upper bounds on magnetic fields derived from consideration of cosmic microwave background distortions and Faraday rotation measurements.
- Publication:
-
Physical Review D
- Pub Date:
- December 2001
- DOI:
- arXiv:
- arXiv:hep-ph/0106217
- Bibcode:
- 2001PhRvD..65b1302A
- Keywords:
-
- 98.62.En;
- 98.70.Sa;
- Electric and magnetic fields;
- Cosmic rays;
- High Energy Physics - Phenomenology;
- Astrophysics
- E-Print:
- Includes extensive discussion of particle acceleration above 10^20 eV in the hot spot-like region of Cen A