A Search for Variability in the HCCN to H2CO Ratio in Comet Hale-Bopp |
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| Authors: | Hofstadter M D Hartogh P McMullin J P Martin R N Jarchow C Peters W |
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| Institution: | (1) Jet Propulsion Laboratory/Caltech, Pasadena, CA 91109, USA;(2) Max-Planck-Institute für Aeronomie, D-37191 Katlenburg-Lindau, Germany;(3) National Radio Astronomy Observatory, Green Bank, WV 24944, USA;(4) Academia Sinica Institute of Astronomy and Astrophysics, Nanking, Taipei, 115, Taiwan R.O.C;(5) Steward Observatory, University of Arizona, Tucson, AZ 85721, USA |
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| Abstract: | We observed submillimeter lines of H2CO and HCN in comet Hale-Bopp near perihelion. One of our goals was to search for short term variability. Our observations
are suggestive, but not conclusive, of temporal and/or spatial changes in the coma's HCN/H2CO abundance ratio of ∼25%. If due to spatial variability, the ratio on the sunward side of the coma is enhanced over other
regions. If due to temporal variability, we find the bulk ratio in the coma changed in less than 16 hours.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | Comet HCN H2CO variability submillimeter |
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