The identification of crystalline olivine in cometary silicates
1989; IOP Publishing; Volume: 341; Linguagem: Inglês
10.1086/167563
ISSN1538-4357
Autores Tópico(s)Space Exploration and Technology
Resumoview Abstract Citations (172) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Identification of Crystalline Olivine in Cometary Silicates Campins, H. ; Ryan, E. V. Abstract An intermediate-resolution spectrum of the 8-13 micron region in comet Halley is obtained which shows a prominent silicate emission feature with structure not observed before in other comets or in interstellar silicates. The presence of a strong 11.3 micron peak reported by Bregman and coworkers is confirmed, and evidence is found for additional structure in the band. By comparison with spectra of interplanetary dust particles and laboratory silicates, it is concluded that small crystalline olivine particles are a major component of the silicates in this comet; other silicates (e.g., amorphous or hydrated) must also be present. The identification of crystalline olivine in this part of the spectrum is supported by the observation of four peaks in 20-50 micron airborne spectra of this comet which have also been attributed to olivine. Publication: The Astrophysical Journal Pub Date: June 1989 DOI: 10.1086/167563 Bibcode: 1989ApJ...341.1059C Keywords: Astronomical Spectroscopy; Cosmochemistry; Halley'S Comet; Olivine; Silicates; Cometary Atmospheres; Crystallinity; Emission Spectra; Infrared Spectra; Interplanetary Dust; Spectrum Analysis; COMETS; SILICATES; CRYSTALINE; OLIVINE; HALLEY; SPECTRA; WAVELENGTHS; ABUNDANCE; INFRARED; COMPARISONS; INTERPLANETARY DUST; METEORITES; IDPS; EARTH-BASED OBSERVATIONS; CARBONACEOUS CHONDRITES; LABORATORY STUDIES; COMPOSITION; ORIGIN; SPECTROPHOTOMETRY; Astrophysics; Comets; ABUNDANCES; COMETS; INFRARED: SPECTRA full text sources ADS |
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