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Title:
Detection of the N = 3-2 transition of CCH in Orion and determination of the molecular rotational constants
Authors:
Ziurys, L. M.; Saykally, R. J.; Plambeck, R. L.; Erickson, N. R.
Affiliation:
AA(California, University, Berkeley, CA), AB(California, University, Berkeley, CA), AC(California, University, Berkeley, CA), AD(Massachusetts, University, Amherst, MA)
Publication:
Astrophysical Journal, Part 1, vol. 254, Mar. 1, 1982, p. 94-99. Research supported by the Dreyfus Foundation (ApJ Homepage)
Publication Date:
03/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Spectroscopy, Hyperfine Structure, Interstellar Matter, Molecular Clouds, Molecular Rotation, Transition Probabilities, Line Spectra, Radicals, Spectroscopic Analysis, Spectrum Analysis
DOI:
10.1086/159709
Bibliographic Code:
1982ApJ...254...94Z

Abstract

We report the detection of five hyperfine components of the N = 3-2 transition of CCH in Orion A. From an analysis of this data combined with N = 1-0 data from previous observations, the rotational constants (B0 and D0) were determined, and the values of the fine structure (gamma) and hyperfine constants (b, c) were improved. We predict the frequencies of additional rotational transitions of CCH up to N = 5-4. A rotational temperature and column density are estimated on the basis of the 3-2 data.

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