EXTINCTION OF OLIVINE AND PYROXENE IN THE MIDINFRARED AND FAR-INFRARED

被引：126

作者：

KOIKE, C

SHIBAI, H

TUCHIYAMA, A

机构：

[1] INST SPACE & ASTRONAUT SCI,SAGAMIHARA,KANAGAWA,JAPAN

[2] OSAKA UNIV,COLL GEN EDUC,INST EARTH & PLANETARY SCI,TOYONAKA,OSAKA 560,JAPAN

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1993年 / 264卷 / 03期

关键词：

COMETS-GENERAL; METEOROIDS; DUST; EXTINCTION; INFRARED-GENERAL;

D O I：

10.1093/mnras/264.3.654

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The extinction coefficients Q(ext)/a of orthopyroxene, clinopyroxene, Fo100, Fo90, Fo80, Fo60, Fo40 and the Allende meteorite have been obtained in the mid- and far-infrared ranges. These crystalline silicates have many absorption peaks. The main peaks in forsterite at 10, 11, 20, 24, 34, 50 and 70 mum shift to longer wavelength and weaken as the Mg/(Mg + Fe) ratio decreases. We discuss the composition of cometary dust grains in relation to our data.

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页码：654 / 658

页数：5

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