Far-Infrared Census of Starburst-Seyfert Connection
Far-Infrared Census of Starburst-Seyfert Connection
复制标题
Starburst-Seyfert 连接的远红外普查
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Y. Taniguchi
中科院分区：
文献类型：
--
作者：
H. Mouri;Y. Taniguchi
从IRAS数据库中提取了赛弗特星系的Shapley-Ames和CfA完整样本的远红外通量密度。这些数据用于将塞弗特星系分类为远红外连续辐射由活动星系核（AGN）、环核星暴或宿主星系主导的星系。虽然活动星系核占主导地位的对象包括相当数量的塞弗特1和2星系，星暴和主机占主导地位的对象包括优先塞弗特2星系。因此，除了尘埃环外，环核星暴区和宿主星系在隐藏宽线区方面也很重要。在形态上，星暴主导的赛弗特星系是较晚的类型，比活动星系核主导的赛弗特星系有更强的相互作用。在晚型星系中，活动星系核中心引擎的爱丁顿光度较低，气体含量较高。这些气体通过星系与星系的相互作用被有效地提供给恒星暴增。主主塞弗特星系的形态是多种多样的。由于星暴在塞弗特星系比那些在经典的星暴星系，我们提出了一个演化从星暴到星暴主导的塞弗特主机主导的塞弗特晚型星系。提出了一个早型星系从活动星系核主导型到寄主主导型的演化过程。这些序列的持续时间为108年的几倍，并在星系从晚期类型到早期类型的演化过程中反复发生。
Far-infrared flux densities are newly extracted from the IRAS database for the Revised Shapley-Ames and CfA complete samples of Seyfert galaxies. These data are used to classify the Seyfert galaxies into those where the far-infrared continuum emission is dominated by the active galactic nucleus (AGN), circumnuclear starburst, or host galaxy. While AGN-dominant objects consist of comparable numbers of Seyfert 1 and 2 galaxies, starburst- and host-dominant objects consist preferentially of Seyfert 2 galaxies. Thus, in addition to the dusty torus, the circumnuclear starburst region and host galaxy are important in hiding the broad-line region. Morphologically, starburst-dominant Seyfert galaxies are of later types and more strongly interacting than AGN-dominant Seyfert galaxies. In a later type galaxy, the AGN central engine has a lower Eddington luminosity, and the gaseous content is higher. The gas is efficiently supplied to the starburst via a galaxy-galaxy interaction. Morphologies of host-dominant Seyfert galaxies are of various types. Since starbursts in Seyfert galaxies are older than those in classical starburst galaxies, we propose an evolution from starburst to starburst-dominant Seyfert to host-dominant Seyfert for a late-type galaxy. An evolution from AGN-dominant Seyfert to host-dominant Seyfert is proposed for an early-type galaxy. These sequences have durations of a few times 108 yr and occur repeatedly within a galaxy during its evolution from a late type to an early type.