Low-temperature optical properties of silicate particles in the far-infrared region
Low-temperature optical properties of silicate particles in the far-infrared region
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DOI：
10.1093/pasj/53.2.243
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发表时间：
2001-06-25
影响因子：
2.3
通讯作者：
Tsuchiyama, A
中科院分区：
文献类型：
--
作者：
Chihara, H;Koike, C;Tsuchiyama, A
研究了星周尘埃类似物（顽火辉石？斜顽火辉石、透辉石和镁橄榄石）在室温（295 K）和液氦温度（4.2 K）下测量。在295 K和4.2 K下，测量的波长范围分别为20-80 μ m和30-80 Irm。不仅在室温下，而且在液氦温度下都能清晰地检测到吸收带。在液氦温度下，可以清楚地观察到温度效应，如（1）连续谱的光谱指数增加，（2）吸收带强度增强，（3）带宽减小，（4）所有样品的所有带的吸收峰向短波长移动。这些结果表明，对于某些吸收带，由于在室温下观察到的数据与实验室获得的数据之间的峰位置不一致，应重新考虑鉴别。我们的实验数据可以从网站（http：//www.kyoto-phu.ac.jp/labo/butsuri/）获得。
The far-infrared absorption spectra of crystalline circumstellar dust analogues (orthoenstatite? clinoenstatite, diopside, and forsterite) were measured at room temperature (295 K) and liquid-helium temperature (4.2 K). The wavelength ranges of the measurements were 20-80 mum and 30-80 Irm at 295 K and 4.2 K, respectively. The absorption bands were detected very clearly not only at room temperature, but also at liquid-helium temperature. The temperature effects were clearly observed at liquid-helium temperature, such as (1) an increase in the spectral index of the continuum, (2) an enhancement in the absorption band strength, (3) a decrease in the band width, and (4) the absorption peaks of all bands of all samples shifted toward a shorter wavelength. These re suits suggest that a reconsideration of the identification should be required for some absorption bands which have been recognized as unidentified bands because of a disagreement in the peak position between the observed data and the laboratory data obtained at room temperature. Our experimental data can be obtained from the web-site (http://www.kyoto-phu.ac.jp/labo/butsuri/).