Brown, M. E. and Bouchez, A. H. and Spinrad, H. and Misch, A. (1998) Sodium Velocities and Sources in Hale–Bopp. Icarus, 134 (2). pp. 228-234. ISSN 0019-1035. doi:10.1006/icar.1998.5941. https://resolver.caltech.edu/CaltechAUTHORS:20120927-120715254
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Abstract
We use spatially resolved high-resolution spectra of the 5890 and 5896 Å sodium D lines in the nuclear regions of Comet Hale–Bopp to determine the sources of cometary sodium. Comparison of the data to a Monte Carlo model of sodium dynamics suggests that the intensities and velocities of sodium in Hale–Bopp can be explained if 55% of the observed sodium is produced at the nucleus, the remaining 45% is produced in an extended source, and the sodium is accelerated by solar radiation pressure. Observations of H_2O^+in Hale–Bopp and subsequent modeling of a plasma-derived sodium source show that this source produces sodium at higher velocities than those observed; any contribution from such a source must be small. The combined nucleus and extended sources of sodium which fit our data best would create a sodium tail at a scale 100 times larger than that of these observations identical in morphology and velocity to that observed in Hale–Bopp.
| Item Type: | Article | |||||||||
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| Additional Information: | © 1998 Academic Press. Received September 15, 1997; revised March 2, 1998. | |||||||||
| Group: | UNSPECIFIED, Division of Geological and Planetary Sciences | |||||||||
| Issue or Number: | 2 | |||||||||
| DOI: | 10.1006/icar.1998.5941 | |||||||||
| Record Number: | CaltechAUTHORS:20120927-120715254 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20120927-120715254 | |||||||||
| Official Citation: | M.E. Brown, A.H. Bouchez, H. Spinrad, A. Misch, Sodium Velocities and Sources in Hale–Bopp, Icarus, Volume 134, Issue 2, August 1998, Pages 228-234, ISSN 0019-1035, 10.1006/icar.1998.5941. (http://www.sciencedirect.com/science/article/pii/S0019103598959413) | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 34510 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 28 Sep 2012 18:22 | |||||||||
| Last Modified: | 09 Nov 2021 23:08 |
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