Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...47..368f&link_type=abstract
(International Astronomical Union and American Astronomical Society, Colloquium on Comets: Gases, Ices, Grains, and Plasma, 61st
Astronomy and Astrophysics
Astronomy
16
Infrared Astronomy, Infrared Spectroscopy, Interplanetary Dust, Particle Size Distribution, Stratosphere, Atmospheric Heating, Chondrites, Meteoritic Composition, Minerals, Orgueil Meteorite, Murchison Meteorite, Allende Meteorite, Meteorites, Johnstown Meteorite, Cosmic Dust, Infrared, Wavelengths, Spectroscopy, Experiments, Spectrum, Particles, Earth, Stratosphere, Crystalline, Pyroxenes, Comparisons, Heating, Tem, Electron Microscopy, Analogs, Data, Magnetite, Pyrrhotite, Olivines, Analysis, Characterist
Scientific paper
A mount containing three crushed chondritic interplanetary dust particles (IDPs) collected in the earth's stratosphere and subjected to infrared spectroscopic measurements shows features near 1000 and 500/cm, suggesting crystalline pyroxene rather than crystalline olivine, amorphous olivine, or meteoritic clay minerals. Chondritic IDP structural diversity and atmospheric heating effects must be considered when comparing this spectrum with interplanetary and cometary dust astrophysical spectra. TEM and infrared observations of one member of the rare subset of IDPs resembling hydrated carbonaceous chondrite matrix material shows a close infrared spectrum resemblance between 4000 and 400/cm to the C2 meteorite Murchison. TEM observations suggest that this class of particles may be used as an atmospheric entry heating-process thermometer.
Fraundorf Philip
Freeman John J.
Patel Indu R.
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