VLT/SINFONI study of black hole growth in high redshift radio-loud quasars from the CARLA survey

Abstract

We present VLT/SINFONI observations of 35 quasars at 2.1 < z < 3.2, the majority of which were selected from the Clusters Around Radio-Loud AGN (CARLA) survey. CARLA quasars have large CIV-based black hole (BH) masses (M(BH) > 10^9 Msun) and powerful radio emission (P(500MHz) > 27.5 W/Hz). We estimate Ha-based M(BH), finding a scatter of 0.35 dex compared to CIV. We evaluate several recipes for correcting CIV-based masses, which reduce the scatter to 0.24 dex. The radio power of the radio-loud quasars is at most weakly correlated with the interconnected quantities Ha-width, L(5100A) and M(BH), suggesting that it is governed by different physical processes. However, we do find a strong inverse correlation between CIV blueshift and radio power linked to higher Eddington ratios and L(5100A). Under standard assumptions, the BH growth time is longer than the cosmic age for many CARLA quasars, suggesting that they must have experienced more efficient growth in the past. If these BHs were growing from seeds since the epoch of reionization, it is possible that they grew at the Eddington limit like the quasars at z ~ 6-7, and then continued to grow at the reduced rates observed until z ~ 2-3. Finally, we study the relation between M(BH) and environment, finding a weak positive correlation between M(BH) and galaxy density measured by CARLA.

MNRAS, accepted (28 pages, 22 figures)

References in corpus (20)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• A Catalog of Quasar Properties from SDSS DR7
• A luminous quasar at a redshift of z = 7.085
• Formation of Supermassive Black Holes by Direct Collapse in Pregalactic Halos
• An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
• Biases in Virial Black Hole Masses: An SDSS Perspective
• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
• The diversity of quasars unified by accretion and orientation
• The evolution of massive black hole seeds
• Physical properties of 15 quasars at $z\gtrsim 6.5$
• Correcting CIV-Based Virial Black Hole Masses
• Black-Hole Spin and Galactic Morphology
• Black-Hole Mass and Growth Rate at High Redshift
• The Black Hole Mass-Bulge Luminosity Relationship for Active Galactic Nuclei from Reverberation Mapping and Hubble Space Telescope Imaging
• Why z > 1 radio-loud galaxies are commonly located in proto-clusters
• Rapidly growing black holes and host galaxies in the distant Universe from the Herschel Radio Galaxy Evolution Project
• The Galaxy Cluster Mid-Infrared Luminosity Function at 1.3<z<3.2
• HST Grism Confirmation of Two $z\sim 2$ Structures from the Clusters Around Radio-Loud AGN (CARLA) Survey
• The Most Massive Active Galactic Nuclei at $1\lesssim z\lesssim 2$

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• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei