Negative absorption near a magnetized black hole - Black hole masers

Details Negative absorption near a magnetized black hole - Black hole masers Negative absorption near a magnetized black hole - Black hole masers

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.124..137a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 124, no. 1, July 1986, p. 137-157.

Astronomy and Astrophysics

Astronomy

9

Black Holes (Astronomy), Electromagnetic Absorption, Interstellar Masers, Plasma-Electromagnetic Interaction, Larmor Precession, Magnetic Fields, Orbit Perturbation, Resonant Frequencies, Schwarzschild Metric, Stimulated Emission

Scientific paper

The mechanism of the energy extraction from charged particles moving in the vicinity of black holes due to the negative absorption of electromagnetic waves is considered. It is shown that there exist a number of resonant frequencies for which the ring of particles circling in the equatorial plane of Kerr black holes amplifies the incident electromagnetic waves. The negative absorption coefficients are calculated both for non-relativistic and ultrarelativistic cases.

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