The frequency of polarized broad emission lines in type 2 Seyfert galaxies

被引：120

作者：

Moran, EC

Barth, AJ

Kay, LE

Filippenko, AV

机构：

[1] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Columbia Univ, Dept Phys & Astron, Barnard Coll, New York, NY 10027 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 540卷 / 02期

基金：

美国国家科学基金会;

关键词：

galaxies : active; galaxies; individual; (NGC; 424; NGC; 591; 2273; 3081; 4507); galaxies : Seyfert-polarization;

D O I：

10.1086/312876

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have discovered polarized broad emission lines in five type 2 Seyfert galaxies (NGC 424, NGC 591, NGC 2273, NGC 3081, and NGC 4507), establishing that these objects are type 1 Seyferts obscured by dense circumnuclear material. The galaxies are part of a distance-limited sample of 31 Seyfert 2s, for which spectropolarimetric observations are now complete. Combined with published reports, our results indicate that at least 11 of the galaxies in this sample, or greater than or equal to 35%, possess hidden broad-line regions. As the first reliable estimate of the frequency of polarized broad emission lines in type 2 Seyfert galaxies, this has important implications for the general applicability of Seyfert unification models.

引用

页码：L73 / L77

页数：5

共 26 条

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