Computer Science – Sound
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998dps....30.3106h&link_type=abstract
American Astronomical Society, DPS meeting #30, #31.06; Bulletin of the American Astronomical Society, Vol. 30, p.1071
Computer Science
Sound
Scientific paper
A series of unique observartions of CO and its daughter products that were obtained simultaneously as part of the University of Wisconsin/Goddard Space Flight Center Hale-Bopp campaign are presented. CO is the second most abundant volatile species in the coma of comets, one that actually dominates production at large heliocentric distances, however its photchemical evolution is poorly understood due to the lack of good emission line tracers in the visible. On 8 April, 1997, we obtained wide field simultaneous observations of CI (1657 Angstroms) intensity and polarization from a sounding rocket, OI (6300 Angstroms) emission using the Wisconsin Hα Mapper (WHaM) facility, and measurements using the McMath-Pierce Solar telescope of CI (9850 Angstroms) emission at different points in the inner coma. Combined, these data contain information on the radial distribution, source function, equilibrium structure, photochemical lifetime of CO, and the outflow speed of its C and O daughter products. Combined, these results suggest rapid dissociation of CO in the collisionally thick inner coma of Hale-Bopp, followed by a high velocity outflow of the daughter products. Both results suggest some discrepancies with expectations, and we discuss their implications.
Harris Walter M.
Mierkiwicz E. J.
Morgenthaler Jeffrey P.
Nordsieck Kenneth H.
Oliversen Ronald James
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