FCRAO Newsletter
August 1996	Postscript version	Previous Newsletters	Volume 6

Probing the Chemistry of Dark Clouds

The above panels show the integrated intensity maps of CO (J=1-0), CS (J=2-1), and SO (J= 3- 2) in the dark cloud core TMC-1. Note the differences in the spatial distributions of the three species. While the CO exhibits a rather flat distribution over the extended region, the SO tends to peak to the north of the dense ridge outlined by the box. Forthermore, the CS emission peaks in two locations, i.e. near the NH peak (filled triangle) and approximately 3 arcminutes southwest of the NH peak. At the cyanopolyyne peak (filled square), CO and SO show local emission peaks, but the CS shows none. These maps are part of a larger study of the physical and chemical properties of dark clouds underway at FCRAO ( See story).

Table of Contents

• A New Array Receiver for the 14-m
• 14-m News Notes
• Call for Proposals
• Science Highlights
  • The Chemical Composition of Dark Clouds
  • Detecting Gravitational Infall
  • A Comet's Molecular Halo
• FCRAO Preprint List