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

Abstract

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.

5 pages, 2 figures. Accepted for publication in ApJ Letters EVLA special issue. The definitive version will be available at http://iopscience.iop.org/

References in corpus (5)

• The Expanded Very Large Array -- a New Telescope for New Science
• SCUBA polarisation observations of the magnetic fields in the prestellar cores L1498 and L1517B
• VLA Observations of the Infrared Dark Cloud G19.30+0.07
• Chemical Variation in Molecular Cloud Cores in the Orion A Cloud
• Depletion of CCS in a Candidate Warm-Carbon-Chain-Chemistry Source L483

Cited by in corpus (6)

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• Substellar-Mass Condensations in Prestellar Cores
• An ALCHEMI inspection of sulphur-bearing species towards the central molecular zone of NGC 253
• Magnetic field measurement in TMC-1C using 22.3 GHz CCS Zeeman splitting
• Studying the chemical and kinematical structures of dense cores TMC-1C, L1544, and TMC-1 in the Taurus molecular cloud using the CCS and NH3 observations
• New Maser Emission from Nonmetastable Ammonia in NGC 7538. II. Green Bank Telescope Observations Including Water Masers