Revised scale lengths for cometary NH

Details Revised scale lengths for cometary NH Revised scale lengths for cometary NH

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...339.1107s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 339, April 15, 1989, p. 1107-1114.

Other

15

Astronomical Photometry, Cometary Atmospheres, Halley'S Comet, Nitrogen Hydrides, Brightness Distribution, Light Curve, Comets, Nh Radical, Halley, Photometry, Production Rate, Procedure, Molecular Processes, Analysis, Surface, Brightness, Models, Parameters, Borrelly, Liller, Parent Molecules, Origin, Formation

Scientific paper

New values for the Haser model scale lengths of NH are derived from extensive narrow-band photometry of comet P/Halley. The observations require a parent scale length which is 5-10 times larger than previously published values. It is shown that the newly determined scale lengths also give better agreement with recent observations of two other comets: P/Borrelly and Liller. When combined with fluorescence efficiency calculations by others, the present results indicate that NH production in typical comets, relative to that of other molecular species, is about 20 times greater than previously believed.

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