Large Aperture Oi 6300 A Observations of Comet Hyakutake: Implications for the Photochemistry of OH and Oi Production in Comet Hale‐Bopp
| Autor: | Michael R. Combi, Jeffrey P. Morgenthaler, W. M. Harris |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal. 657:1162-1171 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1086/511062 |
| Popis: | In previous work (Morgenthaler et al. and Glinski et al.), we proposed a revision to the standard OH photochemistry of van Dishoeck & Dalgarno in order to explain the anomalously bright [O I] 6300 A emission observed by several instruments in comet C/1995 O1 (Hale-Bopp). In order to test the validity of revisions to the OH photochemistry, we present wide-field Fabry-Perot [O I] 6300 A observations of comet C/1996 B2 (Hyakutake) and review similar observations recorded for 1P/Halley and 1989 c1 (Austin). Conventional long-slit spectroscopic observations of several comets in [O I] are also reviewed. The bulk of the evidence suggests that the OH photochemical rates of van Dishoeck & Dalgarno are, on the whole, correct and that the bright [O I] emission observed in Hale-Bopp, particularly at cometocentric distances beyond ~3 × 104 km, was unique to that comet, or possibly any comet with such a large production rate. |
| Databáze: | OpenAIRE |
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