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.
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收藏
页码：241 / +
页数：3
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