| Project/Area Number |
12640428
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
WATANABE Shigeto Hokkaido Univ., Grad. School of Sci., Pro., 大学院・理学研究科, 教授 (90271577)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Yukihiro Hokkaido Univ., Grad. School of Sci., Inst., 大学院・理学研究科, 講師 (50236329)
KURAMOTO Kiyoshi Hokkaido Univ., Grad. School of Sci., Asso. Pro., 大学院・理学研究科, 助教授 (50311519)
HAYASHI Yoshiyuki Hokkaido Univ., Grad. School of Sci., Pro., 大学院・理学研究科, 教授 (20180979)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2000: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | Jupiter / Atmosphere / Ionosphere / Magnetosphere / Plasma / Airglow / Aurora / 惑星大気光 |
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| Research Abstract |
We have built an optical observation system of Jovian visible aurora and airglow, which consists of CCD and narrow band filter on ground-based telescope. The emissions have never been measured from ground. We have carried out the observations by use of Rikubetsu 110cm telescope, lidate 60cm telescope and Hokkaido University 10cm telescope from 1999 to 2001. We have also developed an imaging processing system that analyzes the image of Jupiter taken with short exposure time and integrated. We found some emissions in the northern region of Jupiter. Our system may be able to apply to detect very weak signals from planets or airglow.
We have investigated theoretically the atmosphere of Jupiter as well as Venus, Earth and Mars. The results suggested that the interactions with clouds and plasma are important to planetary atmospheres. Especially, at high altitudes the ion-drag effect must be considered in the planetary upper atmospheres.
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