THE DENSE CORE, OUTFLOW, AND JET IN L810 - HIGH-RESOLUTION HAYSTACK OBSERVATIONS AT 3 MILLIMETERS

We have used the Haystack 37 m radio telescope to obtain high angular resolution spectral line maps of the innermost region of the star-form ing Bok globule L810 (CB 205). These maps cover the central 1' x 1' re gion with a sampling interval of 8''-10''. One map was obtained in the CO (J = 1-0) spectral line in order to identify the source(s) of the high-velocity gas. A CS (J = 2-1) map was obtained in order to find th e location and kinematics of dense gas in this cloud core. Finally, a jetlike feature seen in near-infrared images was examined in two lines each of SO and SO2, to search for postshock chemical abundance enhanc ements. We find a bright 4-11 M(.) CS core associated with both the IR S near-infrared stellar source (identified by Yun et al. 1993) and the IRAS 19433+2743 far-infrared point source. The red and blue CO outflo w lobes do appear to originate from IRS/IRAS 19433+2743 and join with the larger scale CO lobes mapped by Xie & Goldsmith (1990). However, t he outflow lobes are not symmetrically placed about the IRS source. In stead, the outflow lobes are both offset some 30'' westward of the IRS position, producing a ''swept-back'' appearance. The abundance of SO is not enhanced in the region of the jetlike feature, although CS show s a local intensity maximum there. The apparent location of the near-i nfrared jetlike feature, in the middle of the newly resolved blue outf low lobe, may be due to either enhanced dust scattering from a preexis ting cloud clump located within the outflow or it could signify the pr esence of a region influenced by a previous epoch of star formation wi thin L810.