2015 Fiscal Year Final Research Report
Line survey observation of interstellar molecules by immergion grating spectrograph
| Project/Area Number |
24340037
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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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 |
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| Co-Investigator(Kenkyū-buntansha) |
KAWAGUCHI Kentarou 岡山大学, 自然科学研究科, 教授 (40158861)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | 宇宙化学 / 星間分子 / イマージョングレーティング / 中間赤外線 / 振動回転スペクトル / 短寿命分子 |
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| Outline of Final Research Achievements |
We developed a Germanium Immersion Grating Mid-Infrared Cryogenic Spectrograph (GIGMICS), which operates at N-band (8-13 μm in wavelength λ) with maximum resolving power R（≡λ /Δλ）≦ 40,000. In order to conduct the line survey observation by GIGMICS equipped with optical/infrared telescopes in abroad, further design and developement were made for the followings: (1) adjustable stage, (2) external optical system for optical alignment, (3)4 additional spectral slit mirrors, (4)low-pressure gas cell for wavelength calibration, (5)software for the analysis of echelle format, and (6)radiative transfer code for spectral analysis. By the observed spectral data for Venus by the first light observation of GIGMICS in 2011 equipped with the Kanata 1.5-m telescope, we clarified the isotopic fractionation of 13C in CO2 in the Venusian atmosphere. We also clarified the velocity structure of the ambient cloud of the Planetary nebula NGC7027 by the emission line of [SIV] observed by GIGMICS.
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| Free Research Field |
星間化学
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