Observations of ortho- and para-thioformaldehyde
| dc.contributor.author | Gardner, F.F. | |
| dc.contributor.author | Hoglund, B. | |
| dc.contributor.author | Shukre, C.S. | |
| dc.contributor.author | Stark, A.A. | |
| dc.contributor.author | Wilson, T.L. | |
| dc.date.accessioned | 2006-12-19T11:03:54Z | |
| dc.date.available | 2006-12-19T11:03:54Z | |
| dc.date.issued | 1985-05 | |
| dc.description.abstract | In the present observational study of the 3(12) - 2(11) and 3(13) - 2(12) transitions of ortho-H2CS and the 3(03) - 2(02) transitions of para-H2CS, the most precise results, for a beamwidth of 1.8 arcmin, were the para- and ortho- line ratios of 0.51 + or - 0.04 for Orion and 0.44 + or - 0.05 for DR 21 (OH). The ortho/para ratios are close to the values of about 0.56 derived from a large velocity gradient analysis employing the densities, kinetic temperatures and collision rates appropriate to H2CO cloud molecules, assuming a true para/ortho abundance ratio of 1:3. Revised estimates of the rest frequencies of the various formaldehyde lines observed are given. | en |
| dc.format.extent | 680161 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | Astronomy and Astrophysics, 1985, Vol.146, p303-306 | en |
| dc.identifier.issn | 0004-6361 | |
| dc.identifier.uri | http://hdl.handle.net/2289/1605 | |
| dc.language.iso | en | en |
| dc.publisher | Springer-Verlag | en |
| dc.relation.uri | http://adsabs.harvard.edu/cgi-bin/bib_query?1985A&A...146..303G | en |
| dc.rights | (1985) by the European Southern Observatory. Scanned images provided by the NASA ADS. | en |
| dc.subject | ABUNDANCE | en |
| dc.subject | ASTRONOMICAL SPECTROSCOPY | en |
| dc.subject | FORMALDEHYDE | en |
| dc.subject | INTERSTELLAR MATTER | en |
| dc.subject | LINE SPECTRA | en |
| dc.subject | MOLECULAR CLOUDS | en |
| dc.subject | GAS DENSITY | en |
| dc.subject | MOLECULAR COLLISIONS | en |
| dc.subject | ORION NEBULA | en |
| dc.subject | VELOCITY DISTRIBUTION | en |
| dc.title | Observations of ortho- and para-thioformaldehyde | en |
| dc.type | Article | en |