| Autor: |
Takafumi Kamizuka, Ken Tateuchi, Mamoru Doi, Shigeyuki Sako, Tomohiko Nakamura, Kenfichi Tarusawa, Koji Toshikawa, Kimiaki Kawara, Yuzuru Yoshii, Yuka Katsuno Uchimoto, Mizuho Uchiyama, Masahiro Konishi, Masuo Tanaka, Yoichi Tamura, Yoshifusa Ita, Yutaro Kitagawa, Tsutomu Aoki, Kotaro Kohno, T. Soyano, Kentaro Asano, Toshihiko Tanabe, Shintaro Koshida, Kazushi Okada, Ryou Ohsawa, Takashi Miyata, Tomoki Morokuma, Natsuko Kato, Hidenori Takahashi, Kentaro Motohara, Takeo Minezaki |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Publications of The Korean Astronomical Society. 27:297-298 |
| ISSN: |
1225-1534 |
| DOI: |
10.5303/pkas.2012.27.4.297 |
| Popis: |
ANIR (Atacama Near InfraRed camera) is a near infrared camera for the University of TokyoAtacama 1m telescope, installed at the summit of Co. Chajnantor (5,640 m altitude) in northernChile. The high altitude and extremely low water vapor (PWV = 0.5 mm) of the site enable us toperform observation of hydrogen Pa fi emission line at 1.8751 „ m. Since its first light observationin June 2009, we have been carrying out a Pa fi narrow-band imaging survey of nearby luminousinfrared galaxies (LIRGs), and have obtained Pa fi for 38 nearby LIRGs listed in AKARI/FIS-PSC at the velocity of recession between 2,800 km/s and 8,100 km/s. LIRGs are affected by alarge amount of dust extinction ( A V » 3 mag), produced by their active star formation activities.Because Pa fi is the strongest hydrogen recombination line in the infrared wavelength ranges, it isa good and direct tracer of dust-enshrouded star forming regions, and enables us to probe the starformation activities in LIRGs. We find that LIRGs have two star-forming modes. The origin of thetwo modes probably come from differences between merging stage and/or star-forming process. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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