AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 84. Studying the Anatomy of the Milky Way
Display, Thursday, June 3, 1999, 9:20am-4:00pm, Southwest Exhibit Hall

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[84.08] The BU-FCRAO Milky Way Galactic Ring Survey I. The first two Square Degrees

R. Simon, J.M. Jackson, D.P. Clemens, T.M. Bania, M. Kolpak (BU), M.H. Heyer (UMASS)

The Milky Way Galactic Ring Survey (GRS) exploits the new 16 element array receiver SEQUOIA on the FCRAO 14m telescope to map molecular gas in the First Galactic Quadrant with unprecedented sensitivity (0.2 -- 0.4 K), angular resolution (45''), and spectral resolution (0.2 km/s). Unlike previous molecular line surveys, we achieve the full resolution of our telescope. Moreover, we use both a column density (13CO 1-0) and a volume density tracer (CS 2-1) to image molecular clouds and cloud cores in the inner Galaxy, especially in the ``5 kpc ring,'' the Milky Way's dominant star-forming structure. The GRS will ultimately provide a unique database for the study of cloud structure, Galactic structure, the interstellar medium, and star formation.

Here we present results for the Galactic Ring Survey's first two square degrees, from l=44.5 to 46.5 degrees and b=-0.5 to 0.5 degrees. We display integrated intensity images of both 13CO and CS and compare the GRS to previous molecular line surveys. We also outline the plans to complete the GRS in the next few years.

The Galactic Ring Survey is supported by NSF grant AST-9800334.

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