Density Structure of the SGR B2 Molecular Cloud Probed by Low-J Lines of CS

Details Density Structure of the SGR B2 Molecular Cloud Probed by Low-J Lines of CS Density Structure of the SGR B2 Molecular Cloud Probed by Low-J Lines of CS

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..24..515m&link_type=abstract

Advances in Space Research, Volume 24, Issue 4, p. 515-518.

Computer Science

Scientific paper

We have observed the CS (2-1) and (3-2), and 13CS (2-1) transitions toward the Galactic Center molecular cloud Sgr B2 which consists of several clumps with different chemical properties. We have newly identified a cloud at 30 km s-1 from a CS (2-1) optical depth map. This cloud lies 1.5' South from the Sgr B2 (M) position and has a diameter of ~2.5 pc and a total column density of 7 × 1023 cm-2 assuming optically thin emission of the 13CS (2-1) line. Towards the 2'N Cloud no evidence for a density enhancement is found, which suggests that the strong emission from HNCO and HCO+2 is due to chemical effects. The main isotopic CS lines show broad wing components similar to previous studies, but we find rotational temperatures Trot(CS) < 10 K at this region

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