论文标题
NGC 3182中核星形环的起源
The origin of the nuclear star-forming ring in NGC 3182
论文作者
论文摘要
我们使用来自Calar Alto Alto Legacy积分区域调查的积分场光谱数据研究NGC3182 Galaxy的恒星和电离气体运动学和NGC3182星系的恒星种群。我们试图阐明NGC 3182中的环结构的性质。我们发现向环的负恒星年龄梯度，而[α/fe]在环中的增强。恒星金属性显示出平滑的负梯度。从线比诊断图中，我们确认NGC 3182是发射线通量比的Seyfert Galaxy，而内环中的气体主要由年轻恒星电离。但是，在其气体运动学中找不到流出的任何明显特征。在环中，恒星形成似乎最近发生了，与中心相比，气体金属性略有增强。从我们的结果来看，我们得出结论，在短时间内，恒星形成发生在周环区域，这可能是由于AGN辐射压力的积极反馈而导致的。
We investigate the stellar and ionized gas kinematics, and stellar populations of NGC3182 galaxy using integral field spectrograph data from the Calar Alto Legacy Integral Field Area survey. We try to clarify the nature of the ring structure in NGC 3182. We find a negative stellar age gradient out to the ring, while [α/Fe] considerably enhanced in the ring. The stellar metallicity shows a smooth negative gradient. From the line ratio diagnostic diagrams, we confirm that NGC 3182 is a Seyfert galaxy from emission line flux ratio, while the gas in the inner ring is ionized mostly by young stars. However, any obvious feature of outflows is not found in its gas kinematics. In the ring, star formation seems to have recently occurred and the gas metallicity is slightly enhanced compared to the center. From our results, we conclude that star formation has occurred in the circumnuclear region within a short period and this may result from a positive feedback by AGN radiation pressure.
