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http://hdl.handle.net/20.500.12386/29096
Titolo: | Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey: No Evidence of AGN-driven Quenching | Autori: | Suh, Hyewon Civano, Francesca Hasinger, Günther 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 |
Data pubblicazione: | 2017 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 841 | Fascicolo: | 2 | Da pagina:: | 102 | Abstract: | We investigate the star formation properties of a large sample of ∼2300 X-ray-selected Type 2 Active Galactic Nuclei (AGNs) host galaxies out to z∼ 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< {log} {M}<SUB>{stellar</SUB>}/{M}<SUB>☉ </SUB>< 12 with uncertainties of ∼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 <SUB>stellar</SUB> 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. | URI: | http://hdl.handle.net/20.500.12386/29096 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/aa725c | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/aa725c | Bibcode ADS: | 2017ApJ...841..102S | Fulltext: | open |
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