Other
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.4910k&link_type=abstract
American Astronomical Society Meeting 208, #49.10; Bulletin of the American Astronomical Society, Vol. 38, p.126
Other
1
Scientific paper
Narrow HI self-absorption (HINSA) allows determination of the atomic hydrogen column density in well-shielded molecular regions. We present a comparitive study of cold atomic HI, molecular emission, and visual extinction in 75 molecular clouds. Our sources, which are not associated with massive star formation, span a range of distances between 140 and 700 pc. We have observed HINSA in approximately half of the clouds observed. The HI data were obtained using the Green Bank Telescope, which we also employed to obtain spectra of OH 1665 MHz and 1667 MHz emission. We used the FCRAO 14m telescope to obtain 12CO, 13CO, and C18O maps of 32 clouds, We use the molecular spectra to study cloud kinematics and other properties. We utilized 2MASS data to obtain the visual extinction of these objects based on stellar reddening. We have developed a new technique for determining the atomic hydrogen column density, which is based on using the characteristics of the associated molecular lines as templates for analyzing the absorption produced by the cold HI against broad background emission features. We compare the molecular column densities determined from the rare isotopes of carbon monoxide with the atomic and total column densities in our sources.
Goldsmith Paul F.
Krco Marko
Li Daming
No associations
LandOfFree
A Survey Of Cold HI In Molecular Cloud Cores And Comparison With Molecular Constituents 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 A Survey Of Cold HI In Molecular Cloud Cores And Comparison With Molecular Constituents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Survey Of Cold HI In Molecular Cloud Cores And Comparison With Molecular Constituents will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1856660