An infrared spectral match between GEMS and interstellar grains

被引：195

作者：

Bradley, JP ^{[1
]}

Keller, LP

Snow, TP

Hanner, MS

Flynn, GJ

Gezo, JC

Clemett, SJ

Brownlee, DE

Bowey, JE

机构：

[1] MVA Inc, Norcross, GA 30093 USA

[2] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[3] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] Univ Washington, Dept Astron, Seattle, WA 98195 USA

[6] SUNY Coll Plattsburgh, Plattsburgh, NY 12901 USA

[7] Queen Mary Univ London, Dept Phys, London E1 4NS, England

来源：

SCIENCE | 1999年 / 285卷 / 5434期

关键词：

D O I：

10.1126/science.285.5434.1716

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Infrared spectral properties of silicate grains in interplanetary dust particles (IDPs) were compared with those of astronomical silicates. The similar to 10-micrometer silicon-oxygen stretch bands of IDPs containing enstatite (MgSiO3), forsterite (Mg2SiO4), and glass with embedded metal and sulfides (GEMS) exhibit fine structure and bandwidths similar to those of solar system comets and some pre-main sequence Herbig Ae/Be stars. Some GEMS exhibit a broad, featureless silicon-oxygen stretch band similar to those observed in interstellar molecular clouds and young stellar objects. These GEMS provide a spectral match to astronomical "amorphous" silicates, one of the fundamental building blocks from which the solar system is presumed to have formed.

引用

页码：1716 / 1718

页数：3

共 60 条

[1] INFRARED SPECTROPOLARIMETRY OF AFGL-2591 - EVIDENCE FOR AN ANNEALED GRAIN COMPONENT [J].