Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...614..518b&link_type=abstract
The Astrophysical Journal, Volume 614, Issue 1, pp. 518-524.
Astronomy and Astrophysics
Astronomy
4
Ism: Molecules, Methods: Laboratory, Molecular Data, Radio Lines: Ism, Techniques: Spectroscopic
Scientific paper
The carbon chain HC7N has been produced in the laboratory by gas-phase copyrolysis of phosphorus trichloride and 2-ethynyl-pyridine (C7H5N). Its rotational spectrum has been investigated in the millimeter-wave region for the ground state and for five vibrationally excited states that lie below 300 cm-1, namely, (v13,v14,v15)=(0,0,1), (0, 0, 2), (0, 0, 3), (0, 1, 0), and (1, 0, 0). Transitions up to J=201<--200 were observed for the ground vibrational state, reaching a frequency as high as 230 GHz. The laboratory assignment of the rotational spectra of HC7N in low-lying vibrational states provides accurate rest frequencies useful for a possible identification of radio lines produced by vibrationally excited HC7N in hot core molecular sources and circumstellar shells.
Bizzocchi Luca
Degli Esposti C.
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