Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apjs..129..611m&link_type=abstract
The Astrophysical Journal Supplement Series, Volume 129, Issue 2, pp. 611-623.
Astronomy and Astrophysics
Astronomy
50
Ism: Molecules, Line: Identification, Molecular Data, Molecular Processes, Radio Lines: Ism
Scientific paper
A summary is given of the laboratory study of the rotational spectra of 11 recently detected carbon chain molecules. Classified according to their various end groups, these are the cyanopolyynes HC15N and HC17N; the isocyanopolyynes HC4NC and HC6NC; the methylcyanopolyynes CH3(CC)3CN, CH3(CC)4CN, and CH3(CC)5CN; and the methylpolyynes CH3(CC)4H, CH3(CC)5H, CH3(CC)6H, and CH3(CC)7H. Measured line frequencies and derived spectroscopic constants are given for each. The microwave laboratory astrophysics of the entire set is now complete in the sense that all the astronomically most interesting rotational transitions, including those with nitrogen quadrupole hyperfine structure, have now been directly measured or can be calculated from the derived constants to a small fraction of 1 km s-1 in equivalent radial velocity. All 11 carbon chains are candidates for astronomical discovery since they are closely related in structure and composition to ones that have already been discovered in space.
Chen Wei
McCarthy Mary C.
Thaddeus Patrick
Travers M. J.
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