Reconnection in Marginally Collisionless Accretion Disk Coronae

Details Reconnection in Marginally Collisionless Accretion Disk Coronae Reconnection in Marginally Collisionless Accretion Disk Coronae

2008-04-28

arxiv.org/abs/0804.4481v2

Astronomy and Astrophysics

Astrophysics

Revised in response to referee. Accepted ApJ. 11 pp., no figures. Uses aastex 5.02

Scientific paper

10.1086/592345

We point out that a conventional construction placed upon observations of accreting black holes, in which their nonthermal X-ray spectra are produced by inverse comptonization in a coronal plasma, suggests that the plasma is marginally collisionless. Recent developments in plasma physics indicate that fast reconnection takes place only in collisionless plasmas. As has recently been suggested for the Sun's corona, such marginal states may result from a combination of energy balance and the requirements of fast magnetic reconnection.

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