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http://hdl.handle.net/20.500.12386/32110
Title: | The evolution of the heaviest super-massive black-holes in jetted AGNs | Authors: | Alessandro Diana CACCIANIGA, Alessandro MORETTI, Alberto IGHINA, LUCA BELLADITTA, SILVIA DELLA CECA, Roberto |
Issue Date: | 2022 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 511 | Issue: | 4 | First Page: | 5436 | Abstract: | We present the space density evolution, from z=1.5 up to z=5.5, of the most massive (M$\geq10^9$M$_{\odot}$) black holes hosted in jetted Active Galactic Nuclei(AGNs). The analysis is based on a sample of 380 luminosity-selected ($\lambda$L$_{1350}\geq10^{46}$ erg s$^{-1}$ and P$_{5\text{GHz}}\geq10^{27}$ W Hz$^{-1}$) Flat Spectrum Radio Quasars (FSRQs) obtained from the Cosmic Lens All Sky Survey (CLASS). These sources are known to be face-on jetted AGNs (i.e. blazars) and can be exploited to infer the abundance of all the (misaligned) jetted AGNs, using a geometrical argument. We then compare the space density of the most massive SMBHs hosted in jetted AGNs with those present in the total population (mostly composed by non-jetted AGNs). We find that the space density has a peak at $z\sim3$, which is significantly larger than the value observed in the total AGN population with similar optical/UV luminosities ($z\sim2.2$), but not as extreme as the value previously inferred from X-ray selected blazars ($z\gtrsim4$). The jetted fraction (jetted AGNs/total AGNs) is overall consistent with the estimates in the local Universe (10--20\%) and at high redshift, assuming Lorentz bulk factors $\Gamma\approx5$. Finally, we find a marginal decrease in the jetted fraction at high redshifts (by a factor of $\sim2$). All these evidences point toward a different evolutionary path in the jetted AGNs compared to the total AGN population. | URI: | http://hdl.handle.net/20.500.12386/32110 | URL: | http://arxiv.org/abs/2202.03444v1 https://academic.oup.com/mnras/article/511/4/5436/6527590?login=true |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stac364 | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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