Probing the accretion-jet physics with the radio/X-ray correlation

Recent observations on both microquasars and AGNs with radio and X-ray telescopes have revealed remarkable radio/X-ray correlation of these objects. Because the radio and X-ray emissions are mainly emitted from jet and accretion flow, the radio/X-ray correlation can be used to probe the accretion-jet physics in these accreting black hole systems. Using a uniform broad line SDSS AGN sample, we derived the black hole fundamental plane relationship among the 1.4GHz radio luminosity (L(r)), 0.1-2.4keV X-ray luminosity (L(X)), and black hole mass (M). We found from our sample that the fundamental plane relation has a very weak dependence on the black hole mass, and a tight correlation also exists between the Eddington luminosity scaled X-ray and radio luminosities for the radio quiet subsample. In addition, we noticed that radio-loud AGNs have steeper power-law slope in the radio/X-ray correlation than radio-quiet AGNs. This is mainly due to the different origin of X-ray emissions in radio-loud and radio-quiet AGNs. We discussed the theoretical interpretations of these results and the similarity in the radio/X-ray correlation between microquasars and AGNs.Astronomy & AstrophysicsCPCI-S(ISTP)