Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003arep...47..467k&link_type=abstract
Astronomy Reports, vol. 47, Issue 6, p.467-479
Astronomy and Astrophysics
Astronomy
Scientific paper
Twenty-eight CS molecular clouds toward HII regions with Galactocentric distances from ˜ 4 to 20 kpc have been studied based on observations obtained in the J=2→1 lines of CS and C34S on the 20-meter radio telescope of the Onsala Space Observatory (Sweden) in March 2001. All 28 clouds have been mapped with an angular resolution of ˜40″. The peak intensity in the C34S line has been measured for 20 objects. An LTE analysis has been performed and the parameters of the molecular cloud cores derived. The core sizes are d A=0.3 4.8 pc, with a median value of ˜1.6 pc. The mean hydrogen densities in the cloud cores are n H 2=3.5×102 3.7 × 104 cm-3, with a median value of ˜7.2×103 cm-3. The value of n H 2 ends to decrease with increasing Galactocentric distance of the cloud. The masses of most clouds are 102-6×103 M &sun;, with the most probable value being M CS˜103 M &sun;. The data follow the dependence M CS ∝d A (2.4 3.2) . As a rule, the cloud masses are lower than the virial masses for M CS<103 M &sun;.
Johansson Lars E. B.
Kislyakov Albert G.
Zinchenko I. I.
No associations
LandOfFree
Physical Properties of Molecular Clouds as Functions of Their Galactocentric Distance from CS and C34S Observations 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 Physical Properties of Molecular Clouds as Functions of Their Galactocentric Distance from CS and C34S Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Physical Properties of Molecular Clouds as Functions of Their Galactocentric Distance from CS and C34S Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1820713