HCN absorption towards Cassiopeia A

Details HCN absorption towards Cassiopeia A HCN absorption towards Cassiopeia A

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....88l...1e&link_type=abstract

Astronomy and Astrophysics, vol. 88, no. 1-2, Aug. 1980, p. L1-L3.

Astronomy and Astrophysics

Astrophysics

28

Absorption Spectra, Cassiopeia A, Hydrocyanic Acid, Interstellar Gas, Molecular Spectra, Abundance, Interstellar Chemistry, Line Spectra, Molecular Excitation

Scientific paper

The HCN J equals 1-0 lines have been observed in absorption in front of
the continuum source Cas A. The spectrum exhibits several features
corresponding to HI clouds in the Orion and Perseus arm. The lines are
found to be optically thin. For an Orion arm cloud magnitude, an N(HCN)
column density of 4 x 10 to the 11th/sq cm is found.

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