Speaker
Description
We present physical properties (e.g., X-ray luminosity and hardness ratio) of WISE 22 $\mu$m-selected galaxies/AGNs. Using a latest eFEDS X-ray point source catalog with optical and mid-infrared (IR) counterparts, we made a sub-sample of 2102 objects with S/N (22 $\mu$m) > 5.0. After removing possible stars, we cross-identified with KiDS, VIKING (near-IR), and H-ATLAS (far-IR) catalogs, which yielded 268 objects at $0 < z < 2.5$ in $\sim$50 deg$^2$. Photometric redshift of some objects are estimated based on the Hyper Suprime-Cam on the Subaru telescope. We derived their stellar mass, star formation rate (SFR), AGN 6 $\mu$m luminosity ($L_{\rm 6}^{\rm AGN}$), and IR luminosity ($L_{\rm IR}$) based on spectral energy distribution fitting with CIGALE. We also estimated their 2-10 keV luminosity ($L_{\rm X}$) and hardness ratio (HR). We found that about 20% of objects are expected to be hyperluminous IR galaxies with $L_{\rm IR}$ > 10$^{13}$ $L_{\odot}$. Their stellar mass-SFR relation would suggest that they have an active star-formation regardless of their redshift. We confirmed a tight correlation between $L_{\rm 6}^{\rm AGN}$ and $L_{\rm X}$, and about 15% of objects are expected to be moderately obscured population with hydrogen column density ($N_{\rm H}$) > 10$^{23}$ cm$^{-2}$, which is roughly consistent with what is inferred from HR.
| Presenter status | External collaborator (Subaru Hyper Suprime-Cam) |
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