Multi-wavelength properties of Type 1 and Type 2 AGN Host Galaxies in the Chandra-COSMOS Legacy Survey
| Autor: | David J. Rosario, Andreas Schulze, Stefano Marchesi, Francesca Civano, Hyewon Suh, Elisabeta Lusso, Masato Onodera, David B. Sanders, Guenther Hasinger |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Active galactic nucleus
010504 meteorology & atmospheric sciences Stellar mass galaxies: active galaxies: evolution galaxies: nuclei quasars: general Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Multi wavelength Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Accretion rate 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Physics Star formation Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Accretion (astrophysics) Galaxy Stars Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Astrophysics::Earth and Planetary Astrophysics |
| Zdroj: | Astrophysical journal, 2019, Vol.872(2), pp.168 [Peer Reviewed Journal] |
| DOI: | 10.48550/arxiv.1902.03244 |
| Popis: | We investigate the multi-wavelength properties of host galaxies of 3701 X-ray-selected active galactic nuclei (AGNs) out to z~5 in the Chandra-COSMOS Legacy Survey. Thanks to the extensive multi-wavelength photometry available in the COSMOS field, we derive AGN luminosities, host stellar masses, and star formation rates (SFRs) via a multi-component SED fitting technique. Type 1 and Type 2 AGNs follow the same intrinsic Lx-L6um relation, suggesting that mid-infrared emission is a reasonably good measure of the AGN accretion power regardless of obscuration. We find that there is a strong increase in Type 1 AGN fraction toward higher AGN luminosity, possibly due to the fact that Type 1 AGNs tend to be hosted by more massive galaxies. The AGN luminosity and SFR are consistent with an increase toward high stellar mass, while both the Mstellar-dependence is weaker towards the high-mass end, which could be interpreted as a consequence of quenching both star formation and AGN activity in massive galaxies. AGN host galaxies tend to have SFRs that are consistent with normal star-forming galaxies, independent of AGN luminosities. We confirm that black hole accretion rate and SFR are correlated up to z~5, when forming stars. The majority (~73%) of our AGN sample are faint in the far-infrared, implying that the moderate-luminosity AGNs seem to be still active after the star formation is suppressed. It is not certain whether AGN activity plays a role in quenching the star formation. We conclude that both AGN activity and star formation might be more fundamentally related to host stellar mass. Comment: 30 pages, 18 figures, accepted for publication in ApJ |
| Databáze: | OpenAIRE |
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