Imaging of the CCS 22.3 GHz emission in the Taurus Molecular Cloud complex

Details Imaging of the CCS 22.3 GHz emission in the Taurus Molecular Cloud complex Imaging of the CCS 22.3 GHz emission in the Taurus Molecular Cloud complex

2011-06-20

arxiv.org/abs/1106.4011v1

2011, ApJ, 739, L4

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

5 pages, 2 figures. Accepted for publication in ApJ Letters EVLA special issue. The definitive version will be available at

Scientific paper

10.1088/2041-8205/739/1/L4

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.

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