Oral Presentation

ALMA Lensing Cluster Survey: Properties of Millimeter Galaxies Hosting X-ray Detected Active Galactic Nuclei

Author(s): Ryosuke Uematsu, Yoshihiro Ueda (Kyoto Univ.), Kotaro Kohno (Univ. of Tokyo), Yoshiki Toba, Satoshi Yamada (Kyoto Univ.), Seiji Fujimoto (Univ. of Copenhagen), Bunyo Hatsukade (Univ. of Tokyo), Hideki Umehata (RIKEN), and ALCS collaboration

Presenter: Ryosuke Uematsu (Kyoto University)

We report the multi-wavelength properties of millimeter galaxies hosting X-ray detected active galactic nuclei (AGNs) from the ALMA Lensing Cluster Survey (ALCS), an extensive survey of well-studied lensing clusters with ALMA, covering an area of 134 arcmin^2 over 33 clusters with a 1.2 mm flux-density limit of ~70 μJy. Utilizing the archived data of Chandra, we identify three AGNs at z=1.06, 2.09, and 3.1 among more than 100 millimeter galaxies (>5σ) in the ALCS. The X-ray spectral analysis shows that two AGNs are not significantly absorbed and one is moderately absorbed. We have performed SED modelling of X-ray to millimeter photometries with the latest version of Code Investigating GALaxy Emission (X-CIGALE) by Yang et al. (2020). We find that our sample shows both high mass accretion rates (intrinsic 0.5-8.0 keV X-ray luminosities of ~10^{44-45} erg/s) and star-forming rates (≳100 M⊙/yr). This demonstrates that a wide-area survey with ALMA and Chandra can selectively detect intense growth of both galaxies and supermassive black holes (SMBHs) at high-z universe.