SUPER - III. Broad line region properties of AGNs at zāā¼ā2
Journal article, 2020
Aims. The SINFONI survey for Unveiling the Physics and Effect of Radiative feedback (SUPER) was designed to conduct a blind search for AGN-driven outflows on X-ray-selected AGNs at redshift z similar to 2 with high (similar to 2 kpc) spatial resolution, and to correlate them with the properties of their host galaxy and central black hole. The main aims of this paper are: (a) to derive reliable estimates for the masses of the black holes and accretion rates for the Type-1 AGNs in this survey; and (b) to characterise the properties of the AGN-driven winds in the broad line region (BLR).Methods. We analysed rest-frame optical and UV spectra of 21 Type-1 AGNs. We used H alpha, H beta, and MgII line profiles to estimate the masses of the black holes. We used the blueshift of the CIV line profile to trace the presence of winds in the BLR.Results. We find that the H alpha and H beta line widths are strongly correlated, as is the line continuum luminosity at 5100 angstrom with H alpha line luminosity, resulting in a well-defined correlation between black hole masses estimated from H alpha and H beta. Using these lines, we estimate that the black hole masses for our objects are in the range Log (M-BH/M-circle dot) = 8.4-10.8 and are accreting at lambda (Edd) = 0.04-1.3. Furthermore, we confirm the well-known finding that the CIV line width does not correlate with the Balmer lines and the peak of the line profile is blueshifted with respect to the [OIII]-based systemic redshift. These findings support the idea that the CIV line is tracing outflowing gas in the BLR for which we estimated velocities up to similar to 4700 km s(-1). We confirm the strong dependence of the BLR wind velocity on the UV-to-X-ray continuum slope, the bolometric luminosity, and Eddington ratio. We infer BLR mass outflow rates in the range 0.005-3 M-circle dot yr(-1), revealing a correlation with the bolometric luminosity consistent with that observed for ionised winds in the narrow line region (NLR), and X-ray winds detected in local AGNs, and kinetic power similar to 10(-7)-10(-4)xL(Bol). The coupling efficiencies predicted by AGN-feedback models are much higher than the values reported for the BLR winds in the SUPER sample; although it should be noted that only a fraction of the energy injected by the AGN into the surrounding medium is expected to become kinetic power in the outflow. Finally, we find an anti-correlation between the equivalent width of the [OIII] line and the CIV velocity shift, and a positive correlation between this latter parameter and [OIII] outflow velocity. These findings, for the first time in an unbiased sample of AGNs at z similar to 2, support a scenario where BLR winds are connected to galaxy-scale detected outflows, and are therefore capable of affecting the gas in the NLR located at kiloparsec scale distances.
galaxies: high-redshift
galaxies: active
quasars: emission lines
quasars: supermassive black holes
galaxies: evolution
Author
G. Vietri
Istituto nazionale di astrofisica (INAF)
Ludwig Maximilian University of Munich (LMU)
European Southern Observatory Santiago
V Mainieri
European Southern Observatory Santiago
D. Kakkad
European Southern Observatory Santiago
H. Netzer
Tel Aviv University
M. Perna
Spanish National Research Council (CSIC)
Istituto nazionale di astrofisica (INAF)
C. Circosta
European Southern Observatory Santiago
University College London (UCL)
C. M. Harrison
Newcastle University
L. Zappacosta
Istituto nazionale di astrofisica (INAF)
B. Husemann
Max Planck Society
P. Padovani
European Southern Observatory Santiago
M. Bischetti
Istituto nazionale di astrofisica (INAF)
A. Bongiorno
Istituto nazionale di astrofisica (INAF)
M. Brusa
University of Bologna
Istituto nazionale di astrofisica (INAF)
S. Carniani
Scuola Normale Superiore di Pisa
C. Cicone
University of Oslo
A. Comastri
Istituto nazionale di astrofisica (INAF)
G. Cresci
Istituto nazionale di astrofisica (INAF)
C. Feruglio
Istituto nazionale di astrofisica (INAF)
F. Fiore
Istituto nazionale di astrofisica (INAF)
G. Lanzuisi
Istituto nazionale di astrofisica (INAF)
F. Mannucci
Istituto nazionale di astrofisica (INAF)
A. Marconi
Istituto nazionale di astrofisica (INAF)
University of Florence
E. Piconcelli
Istituto nazionale di astrofisica (INAF)
A. Puglisi
Istituto nazionale di astrofisica (INAF)
University Paris-Saclay
Durham University
M. Salvato
Max Planck Society
M. Schramm
Saitama University
A. Schulze
National Astronomical Observatory of Japan
Jan Scholtz
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
C. Vignali
University of Bologna
Istituto nazionale di astrofisica (INAF)
G. Zamorani
Istituto nazionale di astrofisica (INAF)
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 644 A175Subject Categories
Meteorology and Atmospheric Sciences
Astronomy, Astrophysics and Cosmology
Probability Theory and Statistics
DOI
10.1051/0004-6361/202039136