Abstract
X-ray and radio emission from X-ray bright galactic nuclei such as LINERS and low luminosity Seyferts is likely to arise from hot two-temperature, advection-dominated accretion flows. The observed hard X-ray and high frequency radio luminosities could be used to estimate the central supermassive black hole masses, which has been tested in some cases with available mass estimates. Large scale and small scale jet activities appear to be an emission process additional to the accretion flow itself for which the critically rotating black hole spin is likely to be responsible. Detection of X-ray bright, low luminosity galactic nuclei in the gamma-ray range could further test the ADAF models of such sources.
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