A 100 pc-scale fast and dense outflow in the narrow-line Seyfert 1 galaxy IRAS 04576+0912

PASJ: Publications of the Astronomical Society of Japan

Mitsuda, Kazuma¹  Kawaguchi, Toshihiro²  Hashiba, Yasuhito³  Sugai, Hajime⁴  Shimono, Atsushi⁴  Hayano, Yutaka⁵  Ozaki, Shinobu⁵  Matsubayashi, Kazuya⁶  Hattori, Takashi⁷  Aoki, Kentaro⁷  Minowa, Yosuke⁷ 

[1] Astronomical Institute, Tohoku University, 6-3 Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan;Department of Economics, Management and Information Science, Onomichi City University, Hisayamada 1600-2, Onomichi, Hiroshima 722-8506, Japan;Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan;Kavli IPMU (WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan;National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;Okayama Astrophysical Observatory, Honjo 3037-5, Kamogata, Okayama 719-0232, Japan;Subaru Telescope, National Astronomical Observatory of Japan, 650 North A’hoku Place, Hilo, HI 96720, USA

关键词: galaxies: active;    galaxies: individual;    galaxies: kinematics and dynamics;    galaxies: nuclei;    galaxies: Seyfert;   

DOI  :  10.1093/pasj/psy089

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

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.

【 授权许可】

CC BY