Distances of Molecular Clouds in the Boston University Galactic Ring Survey

Details Distances of Molecular Clouds in the Boston University Galactic Ring Survey Distances of Molecular Clouds in the Boston University Galactic Ring Survey

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...20925417j&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #254.17; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

Molecular clouds identified within the BU-FCRAO Galactic Ring Survey (GRS) provide an opportunity to study giant molecular clouds with a large homogeneous dataset. We identified 847 molecular clouds in the inner Galaxy using the Clumpfind algorithm developed by Williams (1994) on our GRS 13CO data. For inner Galaxy molecular clouds, the kinematic distance ambiguity has often hampered the ability to determine cloud masses and sizes. H I self absorption, however, can be used to resolve the kinematic distance ambiguity for molecular clouds. Using data from the VLA Galactic Plane Survey (VGPS) (Taylor et al. 2002) we determine the distances to 50 molecular clouds.
Because the distances are now known, we calculate masses for these molecular clouds and their component clumps. We also determine the mass spectrum of the clouds and their clumps.

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