Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...254...29l&link_type=abstract
Astronomy and Astrophysics, Vol.254, NO. FEB(I), P. 29, 1992
Astronomy and Astrophysics
Astrophysics
54
Scientific paper
A model for rapid variability (less than one day) in active galactic nuclei is developed. At radii smaller than (which correspond to 10 Schwarzschild radii for a black hole with 10^8^ M_sun_) accretion disks contain strong turbulent magnetic fields (B ~10^2^ Gauss). Due to convective motions these fields reach the disk corona and are dissipated by magnetic reconnection. In the small reconnection zones (with a length of about 10^11^ cm) electrons are accelerated to relativistic energies. Then the interplay of acceleration and subsequent excitation of Langmuir waves leads to coherent emission of electromagnetic waves by inverse Compton scattering. This scenario may lead to an explanation the observed brightness temperatures exceeding the Compton limit and the extremely small rising time of the variability (10^46^ erg s^-1^ during 1 second (Wagner 1991) This model is not restricted to the optical band. A slight variation of the parameters allows e.g. for variable X-ray emission.
Lesch Harald
Pohl Mario
No associations
LandOfFree
A Possible Explanation for Intraday Variability in Active Galactic Nuclei - Magnetic Reconnection and Coherent Plasma Emission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Possible Explanation for Intraday Variability in Active Galactic Nuclei - Magnetic Reconnection and Coherent Plasma Emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Possible Explanation for Intraday Variability in Active Galactic Nuclei - Magnetic Reconnection and Coherent Plasma Emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1044383