A search for the interstellar HCN dimer

Details A search for the interstellar HCN dimer A search for the interstellar HCN dimer

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...296..218s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 296, Sept. 1, 1985, p. 218-221.

Astronomy and Astrophysics

Astronomy

3

Hydrocyanic Acid, Interstellar Gas, Molecular Clouds, Molecular Oscillations, Monomers, Radio Spectra, Abundance, Dipole Moments, Radio Sources (Astronomy)

Scientific paper

An unsuccessful search was made for emission from the vibrational ground state of the interstellar HC-12N-14 dimer in nine sources. The (HCN)2 search results reported earlier by other groups were for a vibrationally excited state; hence, this is the first reported attempt to detect the vibrational ground state. Upper limits to the (HCN)2 column density per unit velocity were calculated for each source, and a comparison to HCN data for Orion A was made which suggests that the abundance of the HCN dimer is significantly less than that of the monomer. One unidentified line was detected and is reported here with a tentative identification.

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