Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey : No Evidence of AGN-driven Quenching

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http://hdl.handle.net/10138/195066

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Suh , H , Civano , F , Hasinger , G , Lusso , E , Lanzuisi , G , Marchesi , S , Trakhtenbrot , B , Allevato , V , Cappelluti , N , Capak , P L , Elvis , M , Griffiths , R E , Laigle , C , Lira , P , Riguccini , L , Rosario , D J , Salvato , M , Schawinski , K & Vignali , C 2017 , ' Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey : No Evidence of AGN-driven Quenching ' , Astrophysical Journal , vol. 841 , no. 2 , 102 . https://doi.org/10.3847/1538-4357/aa725c

Title: Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey : No Evidence of AGN-driven Quenching
Author: Suh, Hyewon; Civano, Francesca; Hasinger, Guenther; Lusso, Elisabeta; Lanzuisi, Giorgio; Marchesi, Stefano; Trakhtenbrot, Benny; Allevato, Viola; Cappelluti, Nico; Capak, Peter L.; Elvis, Martin; Griffiths, Richard E.; Laigle, Clotilde; Lira, Paulina; Riguccini, Laurie; Rosario, David J.; Salvato, Mara; Schawinski, Kevin; Vignali, Cristian
Contributor: University of Helsinki, Department of Physics
Date: 2017-06-01
Language: eng
Number of pages: 11
Belongs to series: Astrophysical Journal
ISSN: 0004-637X
URI: http://hdl.handle.net/10138/195066
Abstract: We investigate the star formation properties of a large sample of similar to 2300 X-ray-selected Type 2 Active Galactic Nuclei (AGNs) host galaxies out to z similar to 3 in the Chandra COSMOS Legacy Survey in order to understand the connection between the star formation and nuclear activity. Making use of the existing multi-wavelength photometric data available in the COSMOS field, we perform a multi-component modeling from far-infrared to near-ultraviolet using a nuclear dust torus model, a stellar population model and a starburst model of the spectral energy distributions (SEDs). Through detailed analyses of SEDs, we derive the stellar masses and the star formation rates (SFRs) of Type 2 AGN host galaxies. The stellar mass of our sample is in the range of 9 <logM(stellar)/M-circle dot <12 with uncertainties of similar to 0.19 dex. We find that Type 2 AGN host galaxies have, on average, similar SFRs compared to the normal star-forming galaxies with similar M-stellar and redshift ranges, suggesting no significant evidence for enhancement or quenching of star formation. This could be interpreted in a scenario, where the relative massive galaxies have already experienced substantial growth at higher redshift (z > 3), and grow slowly through secular fueling processes hosting moderate-luminosity AGNs.
Subject: black hole physics
galaxies: active
galaxies: nuclei
quasars: general
ACTIVE GALACTIC NUCLEI
STAR-FORMING GALAXIES
SPECTRAL ENERGY-DISTRIBUTIONS
SUPERMASSIVE BLACK-HOLES
DEEP FIELD-SOUTH
RAY-SELECTED AGN
POINT-SOURCE CATALOG
FAR-INFRARED VIEW
SIMILAR-TO 2.5
X-RAY
115 Astronomy, Space science
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