High resolution measurements of cyanoacetylene in dark clouds

Details High resolution measurements of cyanoacetylene in dark clouds High resolution measurements of cyanoacetylene in dark clouds

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...155..237s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 155, no. 2, Feb. 1986, p. 237-241. DFG-AN SSSR-supported research.

Astronomy and Astrophysics

Astrophysics

9

Acetylene, Cyano Compounds, Interstellar Matter, Molecular Clouds, Emission Spectra, High Resolution, Line Spectra, Molecular Spectra, Optical Thickness

Scientific paper

Emission from the J = 4→3 transition of cyanoacetylene has been observed towards seven dark clouds with a spectral resolution of 0.062 km s-1. These observations were made with the 22 m-radiotelescope of the Lebedev Physcial Institute at Puschino. The optical depth and excitation temperature of the J = 4 level of HCCCN were obtained for each cloud by measuring the intensity ratio of the hyperfine components of the line. Densities and HCCCN abundances were derived.

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