Cosmology with powerful radio-loud AGNs

Weighing black holes in radio-loud AGNs

Because of the contamination of jets, using the size – continuum luminosity relation can overestimate the broad line region (BLR) size and black hole mass for radio-loud AGNs. We propose a new relation between the BLR size and Hβ emission line luminosity and present evidences for using it to get more accurate black hole masses of radio-loud AGNs. For extreme radio-loud AGNs such as blazars with...

Pair-Matching of Radio-Loud and Radio-Quiet AGNs

Active galactic nuclei (AGNs) are known to cover an extremely broad range of radio luminosities and the spread of their radio-loudness is very large at any value of the Eddington ratio. This implies very diverse jet production efficiencies which can result from the spread of the black hole spins and magnetic fluxes. Magnetic fluxes can be developed stochastically in the innermost zones of accre...

Host Galaxy Evolution in Radio-Loud AGNs: Evolution Analysis

Imaging Photometry of Seyfert 1 AGNs and Quasars III: Variability of Radio Quiet and Radio Loud AGNs

Variability of 226 AGNs in the near-infrared J , H , and K ′ bands is analyzed and discussed. An ensemble average for measured variabilities was obtained for various samples of the AGNs divided by absolute B-magnitude MB, redshift z, and radio strength. All the samples in the J , H , and K ′ bands are found to give significant ensemble variability, but no significant wavelength dependence is fo...

The cluster environments of powerful radio - loud and radio - quiet AGN

The spatial clustering amplitude (B gq) is determined for a sample of 44 powerful AGN at z ≃ 0.2. No significant difference is detected in the richness of the cluster environments of the radio-loud and radio-quiet sub-samples, both of which typically inhabit environments as rich as Abell Class ≃ 0. Comparison with radio luminosity-matched samples from Hill & Lilly (1991) and Wold et al. (2000a)...