High Resolution CO Observations of the -190 km s$^{-1}$ Molecular Gas in the Central 80'' of the Galactic Center

Session 43 -- Galactic Structure
Display presentation, Wednesday, 9:20-6:30, Pauley Room

[43.03] High Resolution CO Observations of the -190 km s$^{-1}$ Molecular Gas in the Central 80'' of the Galactic Center

J. M. Marr (Haverford College), C. Lemme, T. L. Wilson (Max-Planck-Inst. f\"ur Radioastronomie), T. A. Pauls (NRL), M. C. H. Wright (Univ. of Cal., Berkeley), A. L. Rudolph (NASA Ames Research Center)

We have mapped the CO emission in J=2$\rightarrow$1 and J=1$\rightarrow$0 in a 140$''$ by 100$''$ region around Sgr A West at radial velocities from --250 to --170 km s$^{-1}$ with a resolution of 11$''$. The measurements were made in January 1992 with the IRAM 30-m telescope which has an angular resolution of 21$''$ for the 1$\rightarrow$0 line and 11$''$ for the 2$\rightarrow$1 line.

Our maps reveal that the --190 km s$^{-1}$ molecular feature reported by Liszt (1991, AAS Bulletin) appears to end at the brightest clump in the circumnuclear molecular ring (G\"usten et al. 1987, Ap. J.) and makes a sharp bend about a point 50$''$ due West of the southern end of the ring. Additionally, the blueshift increases with increasing distance from the ring and Galactic center.

This research was partially funded by the Margaret Cullinan Wray Charitable Lead Trust.

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