NGC 2992是一个中间的塞弗特1星系，显示出千秒差距尺度的外流，这可能是由于活动星系核或星暴活动。因此，我们的目标是调查它的中心区域在过去的一个假定的星暴和它的连接到活动星系核和外流。观测是用VLT上的自适应光学近红外积分场摄谱仪SINFONI进行的，并辅之以VLT上ISAAC的长缝观测，以及斯皮策档案中的N波段和Q波段数据。SINFONI数据的空间和光谱分辨率分别为50 pc和83 km/s。3”x 3”的视场对应于450 pc x 450 pc。将多环芳烃的Br_γ等效宽度和谱线通量与恒星星族模型进行了比较，以限制推定的最近恒星形成的年龄。本文提出了一个简单的几何模型，即两个相互倾斜的圆盘和一个附加的圆锥来描述流出，以解释在H_2 1- 0 S（1）中观察到的复杂速度场。Br_gamma和恒星连续谱的形貌不同，表明至少有一部分Br_gamma辐射来自活动星系核。这是证实了PAH发射线在6.2微米和11.2微米和强度的硅吸收功能在9.7微米，这表明占主导地位的活动星系核活动与相对较小的星爆贡献。我们发现一个40亿年-50亿年的恒星暴年龄从Br_gamma线诊断和无线电连续;正在进行的恒星形成可以排除在外。能量学和时间尺度都表明，外流是由活动星系核驱动的，而不是恒星暴增。H_21 - 0 S（1）在中心450 pc观测到的复杂速度场可以用星系旋转和外流的叠加来解释。
英文摘要：
NGC 2992 is an intermediate Seyfert 1 galaxy showing outflows on kilo parsec scales which might be due either to AGN or starburst activity. We therefore aim at investigating its central region for a putative starburst in the past and its connection to the AGN and the outflows. Observations were performed with the adaptive optics near infrared integral field spectrograph SINFONI on the VLT, complemented by longslit observations with ISAAC on the VLT, as well as N- and Q-band data from the Spitzer archive. The spatial and spectral resolutions of the SINFONI data are 50 pc and 83 km/s, respectively. The field of view of 3" x 3" corresponds to 450 pc x 450 pc. Br_gamma equivalent width and line fluxes from PAHs were compared to stellar population models to constrain the age of the putative recent star formation. A simple geometric model of two mutually inclined disks and an additional cone to describe an outflow was developed to explain the observed complex velocity field in H_2 1-0S(1). The morphologies of the Br_gamma and the stellar continuum are different suggesting that at least part of the Br_gamma emission comes from the AGN. This is confirmed by PAH emission lines at 6.2 micron and 11.2 micron and the strength of the silicon absorption feature at 9.7 micron, which point to dominant AGN activity with a relatively minor starburst contribution. We find a starburst age of 40 Myr - 50 Myr from Br_gamma line diagnostics and the radio continuum; ongoing star formation can be excluded. Both the energetics and the timescales indicate that the outflows are driven by the AGN rather than the starburst. The complex velocity field observed in H_2 1-0S(1) in the central 450 pc can be explained by the superposition of the galaxy rotation and an outflow.
