2015 Fiscal Year Annual Research Report
| Project/Area Number |
26610177
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| Research Institution | Tohoku University |
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Principal Investigator |
中村 智樹 東北大学, 理学(系)研究科(研究院), 教授 (20260721)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 宇宙・惑星科学 / 小惑星 / 反射スペクトル |
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| Outline of Annual Research Achievements |
含水小惑星の反射スペクトルから、小惑星表層物質の含水量を求めるのが最終目標である。本年度は、酸素分圧をIWに固定してマーチソンCM炭素質隕石試料を400℃、600℃、900℃に加熱し、加熱による水分量変化、鉱物学的変化、反射スペクトルの変化を調べた。その結果、400℃加熱でPCPの分解に伴い水分量が減少し、600℃加熱で含水ケイ酸塩分解に伴いほぼすべての水分が失われることがわかった。反射スペクトルも鉱物学的変化、水分量変化と相関して変動していくことが確認できた。一方で、加熱実験後に大気に曝すことにより、大気中の水分が腹水することがわかった。腹水した水分は、吸着水と異なり、400℃程度の高温に加熱しないと脱水しないことがわかった。腹水分を補正することで、3ミクロンバンドの吸収深さと水分量の関係を定量化することができた。今後は小惑星観測のあかり衛星のデータを用いて、実際の小惑星表層の水分量を定量化することを試みる。
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Research Products
(28 results)
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[Presentation] Mineralogy of Experimentally Heated Tagish Lake2016
Author(s)
Nakato A., Chan Q. H.-S., Nakamura T., Kebukawa Y., Zolensky M. E.
Organizer
47th Lunar and Planetary Science Conference
Place of Presentation
The Woodlands Waterway Marriott Hotel and Convention Center(Texas)
Year and Date
2016-03-21 – 2016-03-25
Int'l Joint Research
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[Presentation] Early Stage of Aqueous Alteration and Interaction Between Inorganic and Organic Materials in Cometary Bodies: Insights from Antarctic Micrometeorites2016
Author(s)
Noguchi T., Yabuta H.,Itoh S., Sakamoto N., Mitsunari T., Okubo A., Okazaki R., Nakamura T., Tachibana S., Terada K., Ebihara M., Imae N., Kimura M., Nagahara H.
Organizer
47th Lunar and Planetary Science Conference
Place of Presentation
The Woodlands Waterway Marriott Hotel and Convention Center(Texas)
Year and Date
2016-03-21 – 2016-03-25
Int'l Joint Research
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[Presentation] Reflectance Spectra Measurement of Various Carbonaceous Chondrites Using Hayabusa-2 Near Infrared Spectrometer2015
Author(s)
Nakamura T., Iwata T., Kitasato K., Abe M., Osawa T,. Matsuoka M., Nakauchi Y., Arai T., Komatsu M., Hiroi T., Imae N., Yamaguchi A., Kojima H.
Organizer
78th Annual Meeting of the METEORITICAL SOCIETY
Place of Presentation
University of California, Berkeley(California)
Year and Date
2015-07-27 – 2015-07-31
Int'l Joint Research
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[Presentation] Depletion of Volatiles and Timing of Heating Recorded in Thermally Metamorphosed Hydrous Carbonaceous Chondrites2015
Author(s)
Nakamura T., Park J., Ahn I. S., Shirai N., Sekimoto S., Nakato A., Nakashima D., Turrin B. D., Lindsay F. N., Herzog G. F., Delaney J. S., Swisher C. C., III Nagao K.
Organizer
78th Annual Meeting of the METEORITICAL SOCIETY
Place of Presentation
University of California, Berkeley(California)
Year and Date
2015-07-27 – 2015-07-31
Int'l Joint Research
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[Presentation] Variations in Organic Functional Groups Between Hydrous and Anhydrous Antarctic Micrometeorites2015
Author(s)
Yabuta H., Noguchi T., Itoh S., Nakamura T., Mitsunari T., Okubo A., Okazaki R., Tachibana T., Terada K., Ebihara M., Nagahara H.
Organizer
78th Annual Meeting of the METEORITICAL SOCIETY
Place of Presentation
University of California, Berkeley(California)
Year and Date
2015-07-27 – 2015-07-31
Int'l Joint Research
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[Presentation] Application of Antarctic Meteorites to Grand Performance Test of the Near Infrared Spectrometer on Board the Hayabusa 2 Spacecraft2015
Author(s)
Nakamura T., Iwata T., Kitasato K., Abe M., Osawa T., Matsuoka M., Nakauchi Y., Arai T., Komatsu M., Hiroi T., Imae N., Yamaguchi A., Kojima H.
Organizer
XII International Symposium on Antarctic Earth Science
Place of Presentation
Goa Marriott Resort & Spa(India)
Year and Date
2015-07-13 – 2015-07-17
Int'l Joint Research
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