期刊
ASTRONOMY & ASTROPHYSICS
卷 525, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201014987
关键词
accretion, accretion disks; radiation mechanisms: non-thermal; galaxies: active; radio continuum: galaxies; radiation mechanisms: thermal
资金
- European Research Council [209622: E3ARTHs]
- Centre National d'Etudes Spatiales
The basic mechanism responsible for radio emission in radio-loud active galactic nuclei (AGNs) is assumed to be synchrotron radiation. We suggest here that radio emission in radio-quiet objects is also due to synchrotron radiation of particles accelerated in shocks. We consider generic shocks and study the resulting synchrotron properties. We estimate the synchrotron radio luminosity and compare it with the X-ray component produced by inverse Compton emission, and find that the radio-to-X-ray luminosity ratio is much less than unity, with values typical of radio-quiet sources. The predicted trends in source parameters, black hole mass, and accretion rate may account for the anticorrelation between radio loudness and Eddington ratio observed in different AGN samples.
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