Type 2 AGN host galaxies in the Chandra-COSMOS Legacy Survey: No
  Evidence of AGN-driven Quenching
  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 analysis 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 9 < log
M_{stellar}/M_{\odot} < 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_{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.
