A 100 pc-scale fast and dense outflow in the narrow-line Seyfert 1 galaxy IRAS 04576+0912. (30th August 2018)

• Record Type: Journal Article
• Authors: Kawaguchi, Toshihiro; Ozaki, Shinobu; Sugai, Hajime; Matsubayashi, Kazuya; Hattori, Takashi; Shimono, Atsushi; Aoki, Kentaro; Hayano, Yutaka; Minowa, Yosuke; Mitsuda, Kazuma; Hashiba, Yasuhito
• Is Part Of: Publications of the Astronomical Society of Japan. Volume 70:Number 5(2018:Oct.)
• Publication Date: 2018-08-30
• Subjects: galaxies: active -- galaxies: individual (IRAS 04576+0912) -- galaxies: kinematics and dynamics -- galaxies: nuclei -- galaxies: Seyfert; Astronomy -- Periodicals; 520.5
• DOI: 10.1093/pasj/psy089
• Languages: English
• ISSNs: 0004-6264

Abstract

Abstract: We report the initial results of an adaptive-optics-assisted, optical integral-field-unit observation of IRAS 04576+0912, the nearest ( z = 0.039) active galactic nucleus with a prominent blueshift/tail in [O iii ] emission from a sample of such objects that we have collected from the literature. We aim at addressing the putative quasar-mode feedback process with Subaru/Kyoto 3D II+AO188. The optical waveband (6400–7500 Å) enables us to measure the gas density via the [S ii ] doublets, in contrast to earlier near-IR studies. Since the fast [O iii ] outflow happens only around rapidly growing central black holes, this object is suitable for investigating the black hole–galaxy coevolution. The obtained data cube exhibits a blue tail in the [S ii ] emission at many lenslets. By fitting the spectrum with the high excess flux at the [S ii ] bluetail, we find a fast (∼860 km s −1 ), dense (>3000 cm −3 ), wide-angle, and offset outflow in central 100 pc scales. Although the large opening angle and the high gas outflow-to-accretion ratio may favor the feedback hypothesis, the inferred kinetic power injection rate of this ionized gas outflow seems insufficient to influence the whole host galaxy. A conventional assumption of a low density must have overestimated the feedback process.