The BU-FCRAO Milky Way Galactic Ring Survey: Structure and Equilibrium of four Molecular Clouds

Details The BU-FCRAO Milky Way Galactic Ring Survey: Structure and Equilibrium of four Molecular Clouds The BU-FCRAO Milky Way Galactic Ring Survey: Structure and Equilibrium of four Molecular Clouds

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...196.2504s&link_type=abstract

American Astronomical Society, 196th AAS Meeting, #25.04; Bulletin of the American Astronomical Society, Vol. 32, p.708

Astronomy and Astrophysics

Astronomy

Scientific paper

We present results on cloud structure of four molecular clouds selected from the BU-FCRAO Milky Way Galactic Ring Survey (GRS), a high resolution study of 13CO in the first Galactic quadrant using the FCRAO 14m telescope. The clouds span a large range of star formation activity, from W49, the most luminous star forming region in the Milky Way, to G045.46+0.05, which has no obvious star formation activity. We use a three-dimensional, gaussian-clump decomposition to identify clumps and deduce their sizes, masses, and line widths. Every cloud has the same clump mass spectrum independent of star formation activity. Relations of clump size with mass and density differ from the conventional Larson relations and the line width shows only a weak dependence with clump size. While the clouds as a whole are in gravitational virial equilibrium, most clumps are not. Star forming clouds have a much higher fraction of gravitationally bound clumps than non star forming clouds. The unbound clumps are probably confined by the weight of the self-gravitating complex and the pressures needed to bind these clumps are largest for the star forming clouds. The Galactic Ring Survey acknowledges support by the NSF via grant AST--9800334.

Affiliated with

Also associated with

No associations

Rating

The BU-FCRAO Milky Way Galactic Ring Survey: Structure and Equilibrium of four Molecular Clouds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The BU-FCRAO Milky Way Galactic Ring Survey: Structure and Equilibrium of four Molecular Clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The BU-FCRAO Milky Way Galactic Ring Survey: Structure and Equilibrium of four Molecular Clouds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1124196