The mid-infrared spectral properties of starburst galaxies and AGNs seen by ISOCAM

被引：0

作者：

Laurent, O ^{[1
]}

Mirabel, IF ^{[1
]}

Charmandaris, V ^{[1
]}

Gallais, P ^{[1
]}

Vigroux, L ^{[1
]}

Cesarsky, CJ ^{[1
]}

机构：

[1] CEA, DSM, DAPNIA, Serv Astrophys, Gif Sur Yvette, France

来源：

UNIVERSE AS SEEN BY ISO, VOLS I AND II | 1999年 / 427卷

关键词：

galaxy; mid-infrared; active galactic nucleus; starburst;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new diagnostic tool based on mid-IR spectra (5-16 mu m) to distinguish the emission triggered by an active galactic nucleus (AGN) from that associated with star formation activity. Mid-IR emission in galaxies integrated over large regions (from 100pc to several kpc) can be understood as a mixing of three components (HII regions, diffuse/photodissociation regions (PDRs), and AGN). We show that AGN spectra, contrary to starburst spectra, present an important continuum below 9 mu m emitted by hot dust and an absence of Unidentified Infrared Bands (UIBs) probably destroyed by photodissociation mechanism in the AGN radiation held. The diagnostic diagram derived from these features can be used to detect obscured AGNs embedded in a large concentration of dust.

引用

页码：913 / 916

页数：4

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