标题： 星系核心区域的气体和尘埃发射 显示英文标题

标题： Gas and Dust Emission from the Nuclear Region of the Circinus Galaxy

摘要： 同时对圆盘星系核心区域的线发射和连续谱发射进行了建模。 考虑了包含活动中心和核周围恒星形成区域的冲击和光致电离综合效应的复合模型。 尘埃再辐射、气体的自由-自由辐射和同步辐射的影响被一致地处理。 所提出的模型解释了两个重要的观测特征。 首先，圆盘星系中心源的高遮蔽是由具有特征性高尘气比的高速度和高密度云层产生的。 它们的高速度，高达1500 km\s ，使它们非常接近活动中心。 其次，得到的线发射区的大小与圆盘星系的冕状区和窄线区的观测限制很好地一致。 显示英文摘要

摘要： Simultaneous modeling of the line and continuum emission from the nuclear region of the Circinus galaxy is presented. Composite models which include the combined effect of shocks and photoionization from the active center and from the circumnuclear star forming region are considered. The effects of dust reradiation, bremsstrahlung from the gas and synchrotron radiation are treated consistently. The proposed model accounts for two important observational features. First, the high obscuration of Circinus central source is produced by high velocity and dense clouds with characteristic high dust-to-gas ratios. Their large velocities, up to 1500 km\s, place them very close to the active center. Second, the derived size of the line emitting region is well in agreement with the observed limits for the coronal and narrow line region of Circinus.