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Upper limits to the S2 abundance in several comets observed with the International Ultraviolet Explorer (1992)

Feldman, P. D. ; Budzien, S. A.

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Publication Date: 2019-08-28

Description: Reprocessed IUE spectra are used in conjunction with a recent S2 g-factor calculation in a reevaluation of the S2 scale length in Comet IRAS-Araki-Alcock (1983 VII); a new value of 200 km is derived. S2 abundances are also determined on the basis of a fitting of a reddened solar spectrum and modeled S2 steady-state g-factors to several 2600-3240 A IUE cometary spectra. The only comet surveyed in which S2 has been detected is IRAS-Araki-Alcock. Attention is given to comet-to-comet differences in the S2 abundance relative to water.

Keywords: ASTROPHYSICS

Type: Icarus (ISSN 0019-1035); 99; 1; p. 143-152.

Format: text

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