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Astron. Astrophys. Suppl. Ser. 144, 441-450

SO and CS observations of molecular clouds

I. The observational data

A. Nilsson - P. Bergman - Å. Hjalmarson

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Onsala Space Observatory, SE-439 92 Onsala, Sweden

Received August 24, 1999; accepted March 14, 2000

Abstract:

We present in this article a rather extensive mapping survey of 19 Galactic molecular clouds in the CS(J=2-1) and SO( $J_{\rm N}=3_2-2_1$) lines using the Onsala 20 m telescope. The data, taken with the same angular resolution of $\sim\! 40''$, are presented as integrated intensity maps and for some relevant positions we also present spectra of the previously mentioned lines and their ³⁴S substituted isotopomer lines. For map positions where we have observed at least one of the less abundant isotopomer transitions we have tabulated the integrated intensities of all observed transitions (Table 2). Already a visual inspection of the maps reveals considerable differences between the SO and CS integrated intensity distributions.

Key words: ISM: clouds -- ISM: molecules