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 http://resolver.caltech.edu/CaltechAUTHORS:20120927-120715254
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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.
|Additional Information:||© 1998 Academic Press. Received September 15, 1997; revised March 2, 1998.|
|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.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||28 Sep 2012 18:22|
|Last Modified:||28 Sep 2012 18:22|
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