Properties of polycyclic aromatic hydrocarbons in the star forming environment in nearby galaxies

被引：0

作者：

Sakon, Itsuki ^{[1
]}

Onaka, Takashi ^{[1
]}

Kato, Daisuke ^{[1
]}

Kaneda, Hidehiro ^{[2
]}

Kataza, Hirokazu ^{[2
]}

Okada, Yoko ^{[2
]}

Kawamura, Akiko ^{[3
]}

Onishi, Toshikazu ^{[3
]}

Fukui, Yasuo ^{[3
]}

机构：

[1] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[2] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[3] Nagoya Univ, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan

来源：

IAU: ORGANIC MATTER IN SPACE | 2008年 / 251期

关键词：

Dust; extinction; ISM: lines and bands; galaxies: ISM; infrared: ISM;

D O I：

10.1017/S1743921308021662

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have carried out the mid-infrared slit spectroscopic observations of sources in the LMC and in NGC 6946 with AKARI/IRC. We investigate the properties of the UIR bands in terms of the star forming activities. We find systematically larger ratios of UIR bands in 6-9 mu m to 11.2 mu m band in active star forming regions than in the quiet regions. This behaviour is consistent with the photo-ionization model of PAHs. Our results suggest that the ratios of UIR bands in 6-9 mu m to 11.2 mu m band can be used as more efficient and vigorous tools to measure the extent of on-going star formation in remote galaxies rather than just the presence or absence of the features themselves.

引用

页码：241 / +

页数：3

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