Thioxoethenylidene (CCS) is an abundant interstellar molecule, and a good tracer of high density and evolutionary stage of dense molecular clouds. It is also a suitable candidate for Zeeman splitting observations for its high splitting factor and narrow thermal linewidths. We report here EVLA 22.3 GHz observations of three dense molecular cores TMC-1, TMC-1C and L1521B in the Taurus Molecular Cloud complex to image the CCS 2_1-1_0 transition. For all three sources, the clumpy CCS emission is most likely tracing the starless cores. However, these compact structures account for only ~ 1-13% of the integrated emission detected in single-dish observations, indicating the presence of significant large scale diffuse emission in favorable conditions for producing CCS.
@article{arxiv.1106.4011,
title = {Imaging of the CCS 22.3 GHz emission in the Taurus Molecular Cloud complex},
author = {Nirupam Roy and Abhirup Datta and Emmanuel Momjian and Anuj P. Sarma},
journal= {arXiv preprint arXiv:1106.4011},
year = {2012}
}
Comments
5 pages, 2 figures. Accepted for publication in ApJ Letters EVLA special issue. The definitive version will be available at http://iopscience.iop.org/