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Seyfert 2型星系中的星暴活动
石雷
顾秋生 黄介浩
(南京大学天文系 南京 210093)
摘 要
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星暴和活动星系核之间的联系是活动星系研究领域最重要、最活跃的研究课题之一。Seyfert星系由于距离较近、数目较多和相对低的核活动，已成为研究星暴和活动星系核之间联系的理想天体。综述了活动星系核中存在星暴的观测证据和Seyfert
2型星系核区星暴活动的最新研究结果，着重讨论了存在两类Seyfert
2 型星系(一类是被遮挡的Seyfert 1型星系，另一类是“真正”的Seyfert
2型星系即不存在宽线区的Seyfert 2型星系)的可能性。通过比较具有和不具有偏振宽线的Seyfert
2型星系在红外、射电、光学和X射线光谱性质的差别，发现具有偏振宽线的Seyfert
2型星系在本质上和Seyfert 1型星系是同一类天体，差别只在于观测者视线方向的不同；而不具有偏振宽线的Seyfert
2型星系是一些星系核活动较弱而星暴活动占主导的天体，这些星系从射电、红外、光学到硬X射线，都具有和星暴星系相似的性质。由于这些星系中核的吸积率将比Seyfert
1型星系低近两个量级，因而它们很有可能是一些没有宽发射线区的Seyfert
2型星系，即所谓的“真正”Seyfert 2型星系。
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Nuclear
Starburst Activities in Seyfert 2 Galaxies
Shi Lei Gu Qiusheng
Huang Jiehao
(Department of Astronomy, Nanjing University, Nanjing
210093)
Abstract
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Starburst-AGN
connection is one of the most important and hotly debated issues in
the study of active galaxies. In this paper, we summarize the
observational evidence for nuclear starbursts in AGNs and how we know
about the nuclear star-forming activities in Seyfert 2 galaxies. We
also summarize the possibilities of the existence of two types of
Seyfert 2 galaxies (the hidden Seyfert 1 galaxies and the “real”
Seyfert 2 galaxies without BLR). By comparing properties of
multiwavelength of Seyfert 2 galaxies with polarized broad emission
lines (PBL) with those without, it is found that Seyfert 2 galaxies
with PBL are the same objects as Seyfert 1 galaxies, while Seyfert 2
galaxies without PBL are more likely starburst, and these Seyfert 2
galaxies are the “real”
Seyfert 2 galaxies without broad emission lines regions intrinsically.
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