Computer Science
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icar..142..498m&link_type=abstract
Icarus, Volume 142, Issue Icarus, pp. 498-508.
Computer Science
46
Scientific paper
Hydrogen cyanide (HCN) was detected in Comet Hale-Bopp at infrared wavelengths near 3.0 μm on four dates between Feb 24.0 and May 1.0 1997 using high-resolution spectroscopy. The average rotational temperature retrieved for the (001) vibrational level on UT 1997 April 29.9 was (95+/-6) K near the nucleus, increasing to (122+/-8) K in the intermediate coma (4''-10'' off the nucleus). The HCN production rate on April 29.9 was (3.09+/-0.13)x1028 molecules s-1. When compared with the water production rate obtained from direct measurements of the H2O 100-010 band on common observation dates using the same instrument and data processing algorithms, the weighted average (for the four dates) of the relative abundance (HCN/H2O) was (0.40+/-0.05)%. The measured spatial distribution for HCN is consistent with its release at the nucleus-no significant contribution from a distributed source is required within 10,000 km of the nucleus.
Dello Russo Neil
DiSanti Michael A.
Magee-Sauer Karen
Mumma Michael J.
Rettig Terrence W.
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