| Title : Deuterated thioformaldehyde in the Barnard 1 cloud | |||||||||
| Authors : N. Marcelino, J. Cernicharo, E. Roueff, M. Gerin, R. Mauersberger | |||||||||
| Abstract : | |||||||||
| We report on the detection of deuterated molecules in several dark clouds (Barnard 1, TMC-1, L154 using the | |||||||||
| IRAM 30m telescope at Pico Veleta. | |||||||||
| During a 3mm line survey on these sources, we found several transitions that intially were considered as | |||||||||
| unidentified. Taking into account the reduced number of possible candidates, we discovered that these lines | |||||||||
| were arising from D2CS constants of these molecules, in particular those of D2CS. The HDCS/H2CS and D2CS/HDCS abundance | |||||||||
| ratios in Barnard 1 are both =0.3, implying an extremely high D-enhancement in thioformaldehyde towards this cloud. | |||||||||