The Close AGN Reference Survey (CARS): Tracing the circumnuclear star formation in the super-Eddington NLS1 Mrk 1044
The Close AGN Reference Survey (CARS): Tracing the circumnuclear star formation in the super-Eddington NLS1 Mrk 1044
复制标题
近距离 AGN 参考巡天 (CARS)：追踪超级爱丁顿 NLS1 Mrk 1044 中的环核恒星形成
DOI：
10.1051/0004-6361/202243697
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发表时间：
2022
影响因子：
6.5
通讯作者：
O’Dea, C. P.
中科院分区：
文献类型：
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作者：
Winkel, N.;Husemann, B.;Davis, T. A.;Smirnova-Pinchukova, I.;Bennert, V. N.;Combes, F.;Gaspari, M.;Jahnke, K.;Neumann, J.;O’Dea, C. P.
背景对于超大质量黑洞快速生长的宿主星系条件知之甚少。窄线Seyfert 1（NLS 1）星系通常表现出很高的吸积率，被认为是活动星系核（AGN）的原型，在其演化的早期阶段，我们利用自适应光学（AO）辅助VLT MUSE NFM观测了最近的超爱丁顿吸积NLS 1星系Mrk 1044。与档案MUSE WFM数据一起，我们的目标是了解驱动Mrk 1044的黑洞acceptance.MethodsWe的主机星系过程中提取的微弱的恒星连续发射的活动星系核的退混主机和空间分辨发射线诊断与前所未有的分辨率。结合MUSE WFM和NFM-AO观测，我们使用了一个薄的旋转盘的运动学模型来跟踪恒星和电离气体的运动从10千秒差距的星系规模下降到1030秒差距周围nucleus.ResultsMrk 1044的恒星运动学遵循圆周旋转，而电离气体显示在中心的纤细螺旋功能。 我们解决了一个紧凑的恒星形成环核椭圆（CNE），有一个半短轴为306 pc。 在这个CNE中，气体富含金属，其线比与星星形成的激发完全一致。随着综合星星的形成率为0.19 ± 0.05兆光年-1，CNE贡献了27%的银河系范围内的星星形成。ConclusionsWe得出结论，Mrk 1044的核活动尚未影响到环核星星的形成。 因此，Mrk 1044与NLS 1是年轻活动星系核的观点一致。一个简单的质量预算的考虑表明，环核星星的形成和活动星系核相连接的电离气体速度场的模式是一个正在进行的活动星系核喂养的签名。
ContextThe host galaxy conditions for rapid supermassive black hole growth are poorly understood. Narrow-line Seyfert 1 (NLS1) galaxies often exhibit high accretion rates and are hypothesized to be prototypes of active galactic nuclei (AGN) at an early stage of their evolution.AimsWe present adaptive optics (AO) assisted VLT MUSE NFM observations of Mrk 1044, the nearest super-Eddington accreting NLS1. Together with archival MUSE WFM data, we aim to understand the host galaxy processes that drive Mrk 1044’s black hole accretion.MethodsWe extracted the faint stellar continuum emission from the AGN-deblended host and performed spatially resolved emission line diagnostics with an unprecedented resolution. Combining both MUSE WFM and NFM-AO observations, we used a kinematic model of a thin rotating disk to trace the stellar and ionized gas motion from 10 kpc galaxy scales down to ∼30 pc around the nucleus.ResultsMrk 1044’s stellar kinematics follow circular rotation, whereas the ionized gas shows tenuous spiral features in the center. We resolve a compact star-forming circumnuclear ellipse (CNE) that has a semi-minor axis of 306 pc. Within this CNE, the gas is metal-rich and its line ratios are entirely consistent with excitation by star formation. With an integrated star formation rate of 0.19 ± 0.05M⊙yr−1, the CNE contributes 27% of the galaxy-wide star formation.ConclusionsWe conclude that Mrk 1044’s nuclear activity has not yet affected the circumnuclear star formation. Thus, Mrk 1044 is consistent with the idea that NLS1s are young AGN. A simple mass budget consideration suggests that the circumnuclear star formation and AGN phase are connected and the patterns in the ionized gas velocity field are a signature of the ongoing AGN feeding.