| Project/Area Number |
22340043
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Nagoya University |
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Principal Investigator |
KANEDA Hidehiro 名古屋大学, 理学(系)研究科(研究院), 教授 (30301724)
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| Co-Investigator(Kenkyū-buntansha) |
ONAKA Takashi 東京大学, 理学系研究会, 教授 (30143358)
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| Project Period (FY) |
2010-04-01 – 2013-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2012: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2011: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2010: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Keywords | 近傍銀河 / 星間ダスト / 宇宙赤外線観測 / 「あかり」 / 赤外線宇宙観測 / 銀河 |
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| Research Abstract |
For the present study, I used the data of the infrared astronomical satellite, AKARI, which were taken in the obervational programs, "the interstellar medium in our Galaxy and nearby galaxies," and "all-sky surveys". Improving the method to process AKARI far-infrared imaging data, I have elucidated the evolution of dust grains in various interstellar environments of nearby galaxies. Because AKARI covered all the sky with improved sensitivities, I derived information on properties of dust in various harsh environments, providing entirely new knowledge on the shattering and destruction of dust, and processing of polycyclic aromatic hydrocarbons (PAHs). In particular, I find that copious amounts of dust are flowing out of galaxies by galactic superwinds, enriching the intergalactic space with dust. I also reveal the presence of PAHs in elliptical galaxies with unusual spectral features, demonstrating importance of the material processing in the interstellar space.
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