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The Fundamental Plane of Black Hole Activity for Low-luminosity Radio Active Galactic Nuclei Across 1 < Z < 4 by Wang, Yijun; Wang, Tao; Ho, Luis C.; Zhong, Yuxing; Luo, Bin is a scholarly article available to read on EtoBox.

What is The Fundamental Plane of Black Hole Activity for Low-luminosity Radio Active Galactic Nuclei Across 1 < Z < 4 about?

The fundamental plane of black hole activity (BHFP) describes the correlation between radio luminosity ($L_R$), X-ray luminosity ($L_X$), and black hole mass. It reflects a disc-jet connection. However, dependence of BHFP on various physical properties of active galactic nuclei (AGNs) and host galaxies is unclear, especially for low-luminosity AGNs, which is important for understanding accretion physics in AGNs. Here we explore the dependence of BHFP on radio loudness, Eddington ratio ($\lambda_E$), redshift, and galaxy star formation properties at 0.1 < z < 4 for radio AGNs. Based on current deep and large surveys, our studies extend to low luminosities and high redshifts. From GOODS and COSMOS fields, we constructed a homogeneous radio AGN sample including 208 objects. We divided the radio AGN sample into 141 radio-quiet (RQ) AGNs and 67 radio-loud (RL) AGNs according to the radio loudness defined by the $L_R$-to-$L_X$ ratio. This ratio shows a bimodal distribution that is well described by two Gaussian models. Their cross point corresponds to a radio loudness threshold of $\log (L_R/L_X) = -2.73$. RQ and RL AGNs show different BHFPs, indicating a dependence of BHFP on the radio

Author

Wang, Yijun; Wang, Tao; Ho, Luis C.; Zhong, Yuxing; Luo, Bin

Published

2024

Language

EN