The discovery of a giant Hα filament in NGC 7213

被引：12

作者：

Hameed, S

Blank, DL

Young, LM

Devereux, N

机构：

[1] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA

[2] Univ Sydney, Sch Phys, Dept Astrophys, Sydney, NSW 2006, Australia

[3] CSIRO, Australia Telescope Natl Facil, Epping, NSW 2121, Australia

[4] New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801 USA

[5] Embry Riddle Aeronaut Univ, Dept Phys, Prescott, AZ 86301 USA

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 546卷 / 02期

基金：

美国国家科学基金会;

关键词：

galaxies : individual (NGC 7213); galaxies : peculiar; galaxies : Seyfert; galaxies : spiral;

D O I：

10.1086/318865

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The nearby Seyfert galaxy NGC 7213 has been imaged in H alpha and H I with the Cerro Tololo Inter-American Observatory 1.5 m telescope and with the Australia Telescope Compact Array, respectively. Optically, NGC 7213 looks undisturbed and relatively featureless, but the continuum-subtracted H alpha image shows a 19 kpc long filament located approximately 18.6 kpc from the nucleus. The Ha filament could be neutral gas photoionized by the active nucleus, as has been suggested for the Seyfert galaxy NGC 5252 or shock-ionized by a jet interacting with the surrounding H I, as has been suggested for the radio galaxy PKS 2240-41. The H I map reveals NGC 7213 to be a highly disturbed system, suggesting a past merging event.

引用

页码：L97 / L100

页数：4

共 26 条

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