NGC 1068内部180 pc年轻恒星的二维映射：与分子气体环和恒星运动学的相关
2D mapping of young stars in the inner 180 pc of NGC 1068: correlation with molecular gas ring and stellar kinematics
摘要：
我们报告的第一个二维映射的恒星星族和NGC 1068的内部180 pc（半径）的空间分辨率为8 pc，使用积分场光谱在近红外。我们已经应用光谱合成技术的仪器NIFS和自适应光学模块ALTAIR在双子座北望远镜获得的数据。最近的两次恒星形成被发现对恒星星族的贡献起了主导作用：第一次发生在3亿年前，覆盖了大部分的核区域;第二次发生在3亿年前，在距离核约100 pc的环状结构中，与H2辐射的膨胀环相吻合。在环内，观察到恒星速度色散的减少，恒星星族主要由300百万年的年龄组成。在35 pc的内部，最老的年龄分量（年龄> 2Gyr）占主导地位的质量，而流量占主导地位的黑体成分的温度范围在700 < T < 800 K，我们归因于尘埃环。我们还发现一些贡献，从黑体和幂律组件以外的核，我们属性的尘埃排放和散射光。
英文摘要：
We report the first two-dimensional mapping of the stellar population and non-stellar continua within the inner 180 pc (radius) of NGC 1068 at a spatial resolution of 8 pc, using integral field spectroscopy in the near-infrared. We have applied the technique of spectral synthesis to data obtained with the instrument NIFS and the adaptive optics module ALTAIR at the Gemini North Telescope. Two episodes of recent star formation are found to dominate the stellar population contribution: the first occurred 300 Myr ago, extending over most of the nuclear region; the second occurred just 30 Myr ago, in a ring-like structure at ~100 pc from the nucleus, where it is coincident with an expanding ring of H2 emission. Inside the ring, where a decrease in the stellar velocity dispersion is observed, the stellar population is dominated by the 300 Myr age component. In the inner 35 pc, the oldest age component (age > 2Gyr) dominates the mass, while the flux is dominated by black-body components with temperatures in the range 700 < T < 800 K which we attribute to the dusty torus. We also find some contribution from black-body and power-law components beyond the nucleus which we attribute to dust emission and scattered light.
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