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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32443
Title: The Type II AGN-host galaxy connection: insights from the VVDS and VIPERS surveys
Authors: VIETRI, Giustina 
GARILLI, BIANCA MARIA ROSA 
POLLETTA, Maria Del Carmen 
Bisogni, Susanna 
CASSARA, LETIZIA PASQUA 
FRANZETTI, PAOLO 
FUMANA, Marco 
GARGIULO, ADRIANA 
Maccagni, D.
MANCINI, CHIARA 
SCODEGGIO, MARCO 
Fritz, A.
Malek, K.
Manzoni, G.
Pollo, A.
Siudek, M.
VERGANI, DANIELA 
Zamorani, G.
ZANICHELLI, Alessandra 
Issue Date: 2022
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 659
First Page: A129
Abstract: We present a study of optically-selected Type II AGN at 0.5 < z < 0.9 from the VIPERS and VVDS surveys, to investigate the connection between AGN activity and physical properties of their host galaxies. The host stellar mass is estimated through spectral energy distribution fitting with the CIGALE code, and star formation rates are derived from the [OII]$\lambda$3727 $\r{A}$ line luminosity. We find that 49% of the AGN host galaxies are on or above the main sequence (MS), 40% lie in the sub-MS locus, and 11% in the quiescent locus. Using the [OIII]$\lambda$5007 $\r{A}$ line luminosity as a proxy of the AGN power, we find that at fixed AGN power Type II AGN host galaxies show a bimodal behaviour: systems with host galaxy stellar mass <10$^{10}$ M$_{\odot}$, reside along the MS or in the starbursts locus (high-SF Type II AGN), while systems residing in massive host-galaxies (>10$^{10}$ M$_{\odot}$) show a lower level of star formation (low-SF Type II AGN). At all stellar masses, the offset from the MS is positively correlated with the AGN power. We interpret this correlation as evidence of co-evolution between the AGN and the host, possibly due to the availability of cold gas. In the most powerful AGN with host galaxies below the MS we find a hint, though weak, of asymmetry in the [OIII] line profile, likely due to outflowing gas, consistent with a scenario in which AGN feedback removes the available gas and halts the star formation in the most massive hosts.
URI: http://hdl.handle.net/20.500.12386/32443
URL: https://www.aanda.org/articles/aa/full_html/2022/03/aa41072-21/aa41072-21.html
http://arxiv.org/abs/2111.08730v1
ISSN: 0004-6361
DOI: 10.1051/0004-6361/202141072
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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