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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31269
Title: The ALMA view of the high-redshift relation between supermassive black holes and their host galaxies
Authors: PENSABENE, ANTONIO 
Carniani, Stefano 
PERNA, MICHELE 
CRESCI, GIOVANNI 
DECARLI, ROBERTO 
Maiolino, Roberto
Marconi, Alessandro 
Issue Date: 2020
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 637
First Page: A84
Abstract: This work aims at studying the $M_{BH}-M_{dyn}$ relation of a sample of $2<z<7$ quasars by constraining their host galaxy masses through full kinematical modeling of the cold gas kinematics, thus avoiding all possible biases and effects introduced by the rough virial estimates usually adopted so far. For this purpose we retrieved public observations of $72$ quasar host galaxies observed in ${\rm [CII]_{158\mu m}}$ or ${\rm CO}$ transitions with the Atacama Large Millimeter Array (ALMA). We then selected those quasars whose line emission is spatially resolved and performed a kinematic analysis on ALMA observations. We estimated the dynamical mass of the systems by modeling the gas kinematics with a rotating disc taking into account geometrical and instrumental effects. Our dynamical mass estimates, combined with $M_{BH}$ obtained from literature and our own new ${\rm CIV}\lambda1550$ observations, have allowed us to investigate the $ M_{BH}/M_{dyn}$ in the early Universe. Overall we obtained a sample of $10$ quasars at $z\sim2-7$ in which line emission is detected with high S/N ($> 5-10$) and the gas kinematics is spatially resolved and dominated by ordered rotation. The estimated dynamical masses place $6$ out of $10$ quasars above the local relation yielding to a $M_{BH}/M_{dyn}$ ratios $\sim10\times$ higher than those estimated in low-$z$ galaxies. On the other hand, we found that $4$ quasars at $z\sim 4-6$ have dynamical-to-BH mass ratios consistent with what is observed in early-type galaxies in the local Universe.
URI: http://hdl.handle.net/20.500.12386/31269
URL: https://www.aanda.org/articles/aa/full_html/2020/05/aa36634-19/aa36634-19.html
http://arxiv.org/abs/2002.00958v2
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201936634
Bibcode ADS: 2020A&A...637A..84P
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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