Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...270..275v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 270, no. 1-2, p. 275-287.
Astronomy and Astrophysics
Astronomy
8
Accretion Disks, Black Holes (Astronomy), Energetic Particles, Stellar Flares, X Ray Binaries, Astronomical Models, Particle Acceleration, Radiation Distribution
Scientific paper
An investigation is conducted of the magnetic flares in the energetic radiation field of an accretion-disk corona, whose X-ray emission may be the source of the hard power-law component in the X-ray spectra of galactic black-hole candidates in their 'high' spectral state. The concept of the low plasma-beta accretion-disk corona (ADC), which produces the hard X-rays via inverse Compton scattering of lower-energy photons from the disk on enegetic electrons in the corona, is elaborated. A spectrum is derived for the up-scattered radiation from current sheets in the ADC; this spectrum mimics a power-law above a critical photon energy.
Kuperus Max
van den Oord H. J. G.
van Oss Roeland F.
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