Oral Presentation

Failed AGN feedback? -- Molecular reservoirs are not severely affected by extremely fast, kpc-scale AGN ionized-wind in ULIRGs at z~0.5

Author(s): Xiaoyang Chen (NAOJ), Masayuki Akiyama (Tohoku U.), Kohei Ichikawa(Tohoku U.), Yoshiki Toba (NAOJ), Hirofumi Noda (Osaka U.), Toshihiro Kawaguchi (Onomichi City U.), Taiki Kawamuro (RIKEN)

Presenter: Xiaoyang Chen (NAOJ)

Large-scale outflows are generally considered as a possible evidence that active galactic nuclei (AGNs) can severely affect their host galaxies. Recently several ultraluminous IR galaxy (ULIRG) selected from AKARI FIR catalog was found to have galaxy-scale [OIII] 5007 outflows with extremely high energy-ejection rates compared to active galaxies at z<1.6. However, the latest ALMA follow-ups of these galaxies reveal that the molecular reservoirs are not severely affected by the fast ionized AGN wind. The velocity of the molecular outflow is slower by one order of magnitude than that of ionized-wind, indicating that the outflowing molecular gas could not escape from the gravitational potential of these galaxies. The finding suggests that the feedback effect on star-forming clouds in hosts could be limited even with extremely fast and powerful AGN ionized-outflows, which is consistent with the vigorous starbursts in the galaxies, i.e., with SFR of 1000 Msun/yr.