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

Details The BU-FCRAO Milky Way Galactic Ring Survey I. The first two Square Degrees The BU-FCRAO Milky Way Galactic Ring Survey I. The first two Square Degrees

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.8408s&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #84.08; Bulletin of the American Astronomical Society, Vol. 31, p.970

Astronomy and Astrophysics

Astronomy

Scientific paper

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 ((13) CO 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 (13) CO 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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