New Features in the 8 - 13 \micron Spectrum of Comet Hale-Bopp (C/1995 O1) and What They Mean.

Details New Features in the 8 - 13 \micron Spectrum of Comet Hale-Bopp (C/1995 O1) and What They Mean. New Features in the 8 - 13 \micron Spectrum of Comet Hale-Bopp (C/1995 O1) and What They Mean.

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...190.0505l&link_type=abstract

American Astronomical Society, 190th AAS Meeting, #05.05; Bulletin of the American Astronomical Society, Vol. 29, p.783

Astronomy and Astrophysics

Astronomy

1

Scientific paper

High quality infrared (8-13 \micron) spectra of Comet Hale-Bopp taken at the IRTF and the MLOF show spectral features due to silicate grains of olivine and enstatite compositions. A new feature at 11.8 micron is identified with emission from small crystalline olivine grains. Spectrum synthesis models reveal that olivine appears in both amorphous and crystalline forms and links dust in the interstellar medium with that in the solar system. Temperature enhancements of the grains over equilibrium values argue for small (<10 \micron) optically thin grains.

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