Oral Presentation

A Multiwavelength Study of Coevolution at z~1.4 in SXDF

Author(s): Kenta Setoguchi

Presenter: Kenta Setoguchi (Kyoto University)

We explore the relation between black hole mass and host stellar mass and that of mass accretion rate versus SFR in moderately luminous (log Lbol ~ 44.5-46.5 erg s^-1), X-ray selected broad-line active galactic nuclei (AGNs) at z = 1.18 - 1.68 in the Subaru/XMM-Newton Deep Field (SXDF). To estimate total stellar mass (Mstellar) and SFR, we reproduce the far-infrared to far-ultraviolet spectral energy distribution of 85 AGNs using X-CIGALE code (Yang et al. 2020), which is the latest version of Code Investigating GALaxy Emission (CIGALE) and is implemented a modern AGN clumpy torus model SKIRTOR.
Most of their host galaxies are classified as main sequence star forming galaxies. We confirm that (1) the mean ratio of the black hole mass (MBH) to total stellar mass (Mstellar) is log MBH/Mstellar = -2.2, which is similar to the local black hole-to-bulge mass relation; (2) the SFR and AGN bolometric luminosities show a positive correlation. These results indicate that (1) bulge-dominant galaxies at z~1.4 already established the local MBH-Mbulge relation; (2) black holes and their host galaxies co-evolve in those AGNs.