Previous abstract Next abstract
We have used the Haystack 37 meter radio telescope to obtain high angular resolution spectral line maps of the innermost region of the star forming Bok globule L810 (CB205). These maps cover the central $1 \times 1$ arcmin region with 10 arcsec resolution. 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 the location and kinematics of dense gas in this cloud core. Finally, a jet-like feature seen in near-infrared images was examined in two lines each of SO and SO$_2$, to search for post-shock chemical abundance enhancements. We find a bright CS core associated with both the IRS near-infrared stellar source (identified by Yun et al 1993) and the $IRAS$ 19433+2743 far-infrared point source. The red and blue CO outflow lobes do appear to originate from IRS/$IRAS$ 19433+2743 and join with the larger scale CO lobes mapped by Xie \& Goldsmith (1990). The outflow lobes are not symmetrically placed about the IRS source. Instead, the outflow lobes show a ``swept back'' look. SO is not strongly enhanced in the region of the ``jet'' feature, although CS shows a faint local peak there. The apparent location of the ``jet'' feature, down the middle of the newly resolved blue outflow lobe, may be due to either enhanced dust scattering from a preexisting cloud clump located within the outflow or due to a partial break out of the outflow from the cloud core.
Wednesday program listing