The relative distribution of ammonia and cyanobutadiyne emission in Heiles 2 dust cloud

Details The relative distribution of ammonia and cyanobutadiyne emission in Heiles 2 dust cloud The relative distribution of ammonia and cyanobutadiyne emission in Heiles 2 dust cloud

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..539l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 189, Nov. 1979, p. 539-550.

Astronomy and Astrophysics

Astronomy

47

Ammonia, Butadiene, Cosmic Dust, Cyano Compounds, Emission Spectra, Interstellar Gas, Line Spectra, Particle Size Distribution, Gas Temperature, Interstellar Chemistry, Molecular Gases, Optical Thickness, Spectrum Analysis

Scientific paper

A map of the NH3 (1, 1) emission in the Heiles 2 dust cloud, observed with 2.2 arcmin resolution, is presented and compared with that of the J = 9-8 transition of HC5N. Although the distribution of the emission of both molecules lies on a ridge, there is a marked anticorrelation in the observed antenna temperatures of the two molecules along it. This appears to be best explained as a variation in the relative abundances of the two molecules along the ridge by a factor of 8-20 in a distance of 10 to the 18th cm.

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