Ammonia abundances in four comets

Details Ammonia abundances in four comets Ammonia abundances in four comets

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...368..279w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 368, Feb. 10, 1991, p. 279-286.

Astronomy and Astrophysics

Astrophysics

25

Abundance, Ammonia, Comet Nuclei, Astronomical Models, Astronomical Spectroscopy, Carbon Monoxide, Emission Spectra, Fluorescence, Spatial Distribution, Comets, Ammonia, Abundance, Comet Nuclei, Production Rate, Emissions, Halley, Borrelly, Hartley-Good, Thiele, Fluorescence, Density, Comae, Water, Condensation, Temperature, Molecular Processes, Ccd Methods, Chemical Reactions, Earth-Based Observations, Procedure, Nh2 Radical, Spectra

Scientific paper

NH2 emission band strengths were measured in four comets and the NH2 column densities were determined in order to measure the ammonia content of the comets. The mean ammonia/water abundance ratio derived for the four comets is found to be 0.13 + or - 0.06 percent, with no significant variation among the comets. The uniformity of this abundance attests to a remarkable degree of chemical homogeneity over large scales in the comet-forming region of the primordial solar nebula, and contrasts with the CO abundance variations found previously in comets. The N2 and NH3 abundances indicate a condensation temperature in the range 20-160 K, consistent with virtually all comet formation hypotheses.

Affiliated with

Also associated with

No associations

Rating

Ammonia abundances in four comets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ammonia abundances in four comets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ammonia abundances in four comets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1315997