University of Tokyo Graduate School of Science
Kyoto Pharmaceutical University Laboratory of Physics
National Astronomical Observatory Subaru Telescope
Osaka University Graduate School of Science
Kyoto Pharmaceutical University Laboratory of Physics
University of Tokyo Graduate School of Science
Osaka University Graduate School of Science
Gunma Astronomical Observatory
National Astronomical Observatory Subaru Telescope
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
第37回月・惑星シンポジウム
雑誌名(英)
Proceedings of the 37th ISAS Lunar and Planetary Symposium
ページ
99 - 102
発行年
2004-02
抄録（英）
The transmittance for crystalline forsterite (Mg2SiO4) particles and the reflectance for single crystalline forsterite, whose temperature range is from 300 to 10 K and wavelength range is from 5 to 100 micrometer, have been measured. The temperature dependences of the absorption and reflection features have been quantified. When the temperature decreases, the spectral features; (1) shift to shorter wavelength (2) increase intensity, and (3) become sharp, which are more noticeable for the features at longer wavelength. The wavelength of spectral peak positions can be the temperatures indicators to the environment where crystalline forsterite exists. The dielectric constants of crystalline forsterite have also been derived for each temperature, 300, 200, 100, and 50 K, by fitting the reflection spectra with dispersion formula of damped oscillators. Mass absorption efficiencies were provided from the dielectric constants by assuming the CDE model. The present measured spectra of crystalline forsterite are useful for analysis of astronomical studies of low temperature environments.
The temperature effect measurement of mid- and far-infrared spectroscopy for the crystalline forsterite
