A Prominent Ionization Cone and Starburst Ring in the Nearby Circinus Galaxy
A Prominent Ionization Cone and Starburst Ring in the Nearby Circinus Galaxy
复制标题
附近圆规座星系中突出的电离锥和星爆环
DOI：
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发表时间：
2009
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影响因子：
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通讯作者：
E. OLlVA
中科院分区：
文献类型：
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作者：
E. OLlVA
塞弗特核的特征光谱长期以来一直被认为是由中心黑洞和吸积盘的硬紫外连续谱引起的光电离。最近，在活动星系核统一方案的背景下，有人提出，1型和2型塞弗茨之间的主要区别，即在前者中看到的宽的允许线，可以归因于一个模糊的环面的存在，在这种情况下，核的可见性取决于视角。支持的证据来自于在反射的偏振光和电离锥中检测到“隐藏的”BLR，这意味着核紫外连续谱的一些“准直”（c.f Antonucci 1993年的评论）。在统一的背景下，
The characteristic spectra of Seyfert nuclei have long been generally attributed to photoionization by the hard UV continuum of a central black hole and associated accretion disk. More recently, within the context of AGN unification schemes, it has been proposed that the primary difference between Seyferts of type 1 and 2, i.e the broad permitted lines seen in the former, could be attributed to the presence of an obscuring torus in which case visibility of the nucleus depends on viewing angle. Supporting evidence has come from the detection of 'hidden' BLR's in reflected polarized, light and of ionization cones which imply some 'collimation' of the nuclear UV continuum (c.f Antonucci 1993 for a review). Also of interest in the context of unification