GOALS-JWST: Resolving the Circumnuclear Gas Dynamics in NGC 7469 in the Mid-infrared
GOALS-JWST: Resolving the Circumnuclear Gas Dynamics in NGC 7469 in the Mid-infrared
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DOI：
10.3847/2041-8213/ac961c
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发表时间：
2022-09
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通讯作者：
V. U;T. Lai;M. Bianchin;R. Remigio;L. Armus;K. Larson;T. Díaz-Santos;A. Evans;S. Stierwalt;D. Law;M. Malkan;S. Linden;Yiqing Song;P. P. van der Werf-P.;T. Gao;G. Privon;A. Medling;L. Barcos-Muñoz;C. Hayward;H. Inami;J. Rich;S. Aalto;P. Appleton;T. Bøhn;T. Böker;Michael J. I. Brown;V. Charmandaris;L. Finnerty;J. Howell;K. Iwasawa;F. Kemper;J. Marshall;J. Mazzarella;J. McKinney;F. Muller-Sanchez;E. Murphy;D. Sanders;J. Surace
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作者：
V. U;T. Lai;M. Bianchin;R. Remigio;L. Armus;K. Larson;T. Díaz-Santos;A. Evans;S. Stierwalt;D. Law;M. Malkan;S. Linden;Yiqing Song;P. P. van der Werf-P.;T. Gao;G. Privon;A. Medling;L. Barcos-Muñoz;C. Hayward;H. Inami;J. Rich;S. Aalto;P. Appleton;T. Bøhn;T. Böker;Michael J. I. Brown;V. Charmandaris;L. Finnerty;J. Howell;K. Iwasawa;F. Kemper;J. Marshall;J. Mazzarella;J. McKinney;F. Muller-Sanchez;E. Murphy;D. Sanders;J. Surace
附近发光的红外星系NGC7469拥有一个塞弗特核，它有一个绕核的恒星形成环，因此是详细研究恒星爆发-活动星系核(AGN)联系的理想地方实验室。我们给出了用JWST中红外仪获得的NGC7469中心1.3kpc区域的积分场观测。为了研究中心活动星系核对气体动力学的影响，研究了∼10 0pC分辨率下的分子和电离气体在4.9-7.6μm区域的分布和运动学。低电离的[Fe II]λ5.34μm和[Ar II]λ6.99μm谱线在原子核和星爆环上是明亮的，而H2 S(5)λ6.91μm则在中心和周围有强烈的峰值。高电离的[mgv]线被分辨出来，并显示出与外流相关的宽广的蓝移成分。它有一个近乎正面的几何图形，在原子核上强烈地达到峰值，在那里它的最大速度达到−650公里S−1，并向东延伸约400pC。来自活动星系核的H2和[Fe II]∼180PC的速度弥散增强区域也显示出高的L(H2)/L(PAH)和L([Fe II])/L(PFα)与核的精确区的W和N之比，在那里电离流出通过激波将能量储存到核和恒星爆发环之间的致密星际介质中。这些对核气体动力学的中红外分辨率观测显示了JWST的威力及其高灵敏度积分场光谱能力，可以分辨附近发光红外星系尘埃核心中超大质量黑洞周围的反馈过程。
The nearby, luminous infrared galaxy NGC 7469 hosts a Seyfert nucleus with a circumnuclear star-forming ring and is thus the ideal local laboratory for investigating the starburst–AGN (active galactic nucleus) connection in detail. We present integral-field observations of the central 1.3 kpc region in NGC 7469 obtained with the JWST Mid-InfraRed Instrument. Molecular and ionized gas distributions and kinematics at a resolution of ∼100 pc over the 4.9–7.6 μm region are examined to study the gas dynamics influenced by the central AGN. The low-ionization [Fe ii] λ5.34 μm and [Ar ii] λ6.99 μm lines are bright on the nucleus and in the starburst ring, as opposed to H2 S(5) λ6.91 μm, which is strongly peaked at the center and surrounding ISM. The high-ionization [Mg v] line is resolved and shows a broad, blueshifted component associated with the outflow. It has a nearly face-on geometry that is strongly peaked on the nucleus, where it reaches a maximum velocity of −650 km s−1, and extends about 400 pc to the east. Regions of enhanced velocity dispersion in H2 and [Fe ii] ∼ 180 pc from the AGN that also show high L(H2)/L(PAH) and L([Fe ii])/L(Pfα) ratios to the W and N of the nucleus pinpoint regions where the ionized outflow is depositing energy, via shocks, into the dense interstellar medium between the nucleus and the starburst ring. These resolved mid-infrared observations of the nuclear gas dynamics demonstrate the power of JWST and its high-sensitivity integral-field spectroscopic capability to resolve feedback processes around supermassive black holes in the dusty cores of nearby luminous infrared galaxies.