Starburst or Seyfert? Using near-infrared spectroscopy to measure the activity in composite galaxies

被引：38

作者：

Hill, TL ^{[1
]}

Heisler, CA

Sutherland, R

Hunstead, RW

机构：

[1] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

[2] Australian Natl Univ, Inst Adv Studies, Mt Stromlo & Siding Spring Observ, Canberra, ACT 2611, Australia

[3] Australian Natl Univ, Astrophys Theory Ctr, Canberra, ACT 2611, Australia

来源：

ASTRONOMICAL JOURNAL | 1999年 / 117卷 / 01期

关键词：

galaxies : active; galaxies : Seyfert; galaxies : starburst;

D O I：

10.1086/300666

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present near-infrared spectra for a sample of galaxies with ambiguous optical emission-line ratios. These galaxies fall between starbursts and Seyferts in the usual optical diagnostic diagrams. We find a similar result with the near-infrared emission-line ratios, which suggests that the galaxies are composite, containing both a starburst and an AGN component. Furthermore, CO absorption, produced in late-type stars, is detected within the sample, although at a weaker level than is typical for starburst galaxies. We conclude that the CO feature is being diluted by a contribution from an AGN, thereby confirming the composite nature of these galaxies.

引用

页码：111 / 125

页数：15

共 63 条

[31] FAR-INFRARED CONTINUUM EMISSION FROM THE NUCLEUS, STARBURST, AND EXTENDED SPIRAL ARMS OF NGC-1068 [J].