Laboratory infrared transmission spectra of individual interplanetary dust particles from 2.5 to 25 microns.
Abstract
Dust particles collected in the stratosphere that have chondritic elemental abundances provide a new form of extraterrestrial matter for laboratory study. Spectral transmission measurements from 2.5 to 25 μm of 26 such particles show that almost all have a dominant 10 μm silicate absorption feature. Twenty-two of the particles can be grouped into one of three spectral classes referred to as olivines, layer-lattice silicates, and pyroxenes after the minerals that provide the best match to the dust spectra. Measurements of large D/H enrichments and solar flare nuclear tracks confirm that at least some particles are interplanetary dust particles. The layer-lattice silicates have additional bands at 3.0, 6.0, 6.8, and 11.4 μm. A comparison of these spectral features with the infrared spectra of comets and interstellar grains is presented.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1985
- DOI:
- 10.1086/163120
- Bibcode:
- 1985ApJ...291..838S
- Keywords:
-
- Absorption Spectra;
- Abundance;
- Infrared Spectra;
- Interplanetary Dust;
- Interstellar Matter;
- Stratosphere;
- Cosmic Dust;
- Olivine;
- Pyroxenes;
- Silicates;
- X Ray Spectra;
- Astrophysics