Towards Synchrotron Radiation Theory In Curved Magnetic Field Lines
Abstract
The radiation emission mechanism from an ultrarelativistic charged particle moving in a curved inhomogeneous magnetic field is analyzed. The power, angular distribution, spectral distribution and polarization properties of the radiation are obtained. Using a more accurate (than in drift approximation) particle's trajectory, we generalize the formulae for synchrocurvature radiation, which have been obtained earlier in [1-4], find out conditions of applicability and reveal new features of synchrocurvature radiation mechanism. Particularly, when the particle's velocity along magnetic field lines tends to the speed of light, there is a band of instantaneous characteristic frequencies instead of a single characteristic frequency for synchrotron or curvature radiation. If the velocity of centrifugal drift is approximately equal to the velocity of Larmor rotation, then it is necessary to use the formulae of synchrocurvature radiation mechanism. The conditions for applicability this radiation mechanism in radio sources are considered. 1. Cheng K.S., Zhang J.L. 1996, ApJ., 463, 271 2. Harko T., Cheng K.S., 2002, MNRAS, 335, 99 3. Sobolev Ya.M., 2000, Problems Atomic Sci. Technol., 2000, #1, 27; 2001, Kosmichna Nauka i Tekhnologiya, dodatok, 7, 89 4. Sobolev Ya.M., 2001, Radio Physics and Radio Astronomy, 6, 277
- Publication:
-
IAU Joint Discussion
- Pub Date:
- August 2006
- Bibcode:
- 2006IAUJD..12E..38S