Spectrum of relativistic radiation from electric charges and dipoles as they fall freely into a black hole
Abstract
The motion of electric charges and dipoles falling radially and freely into a Schwarzschild black hole is considered. The inverse effect of the electromagnetic fields on the black hole is neglected. Since the dipole is assumed to be a point particle, the deformation due to the action of tidal forces on it is neglected. According to the theorem stating that "black holes have no hair", the multipole electromagnetic fields should be completely radiated as a multipole falls into a black hole. The electromagnetic radiation power spectrum for these multipoles (a monopole and a dipole) has been found. Differences have been found in the spectra for different orientations of the falling dipole. A general method has been developed to find the radiated multipole electromagnetic fields for multipoles (including higherorder multipoles—quadrupoles, etc.) falling freely into a black hole. The calculated electromagnetic spectra can be compared with observational data from stellarmass and smaller black holes.
 Publication:

Soviet Journal of Experimental and Theoretical Physics
 Pub Date:
 June 2013
 DOI:
 10.1134/S1063776113050105
 arXiv:
 arXiv:1301.1559
 Bibcode:
 2013JETP..116..904S
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena
 EPrint:
 14 pages, 3 figures