The Radio Spectra of S3 and S4

Details The Radio Spectra of S3 and S4 The Radio Spectra of S3 and S4

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...619..939g&link_type=abstract

The Astrophysical Journal, Volume 619, Issue 2, pp. 939-944.

Astronomy and Astrophysics

Astronomy

2

Ism: Molecules, Molecular Data, Molecular Processes, Radio Lines: Ism, Stars: Formation

Scientific paper

The pure rotational spectra of the polar asymmetric top molecules S3 and S4 have recently been observed in the laboratory for the first time. Approximately 150 transitions of S3 between 10 and 458 GHz and a similar number for S4 between 6 and 271 GHz have been measured. Many transitions of both molecules are accessible with existing telescopes across the entire radio band. The most interesting astronomical lines to 300 GHz are calculated here from the derived spectroscopic constants to an uncertainty of 1 km s-1 or better in equivalent radial velocity, and even at 700 GHz uncertainties are probably worse by only an order of magnitude. Both S3 and S4 are plausible candidates for detection in Galactic molecular sources, the atmosphere of the Jovian moon Io, and comets.

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