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Full-Text Articles in Physical Sciences and Mathematics
Molecular Clouds And Cloud Cores In The Inner Galaxy, N Z. Scoville, Min S. Yun, D B. Sanders, D P. Clemens, W H. Waller
Molecular Clouds And Cloud Cores In The Inner Galaxy, N Z. Scoville, Min S. Yun, D B. Sanders, D P. Clemens, W H. Waller
Min S. Yun
A compilation of CO emission regions and their measured parameters is presented which represents a nearly complete accounting of the molecular clouds in the first quadrant of the Galaxy. Emission regions associated with radio H II regions have systematically brighter CO peaks that are a factor of two to three times larger and have twice the mean velocity dispersion as the general cloud population. Both the H II region clouds and the hot core regions have a Galactic distribution characteristic of a spiral arm population, whereas the colder clouds are much less confined in Galactic azimuthal angle. Virial masses are …
1300 Micron Continuum And C18o Line Mapping Of The Giant Molecular Cloud Cores In Orion, W49, And W51, F. Peter Schloerb, Ronald L. Snell, P. R. Schwartz
1300 Micron Continuum And C18o Line Mapping Of The Giant Molecular Cloud Cores In Orion, W49, And W51, F. Peter Schloerb, Ronald L. Snell, P. R. Schwartz
Astronomy Department Faculty Publication Series
Observations of the 1300-micron continuum emission and the C(O-18) spectral-line emission from three well-studied giant molecular cloud cores: Orion, W49, and W51 are presented. The observations were obtained at the Five College Radio Astronomy Observatory, and they provide a means to examine the consistency of these two methods to trace the column density structure of molecular clouds. A good general correlation is found between the 1300-micron continuum, which traces the column density of dust, and the C(O-18) J = 2-1 line emission, which traces the column density of molecular gas, when the effects of source temperature are taken into consideration. …