Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..393..453z&link_type=abstract
The seventh astrophysical conference: Star formation, near and far. AIP Conference Proceedings, Volume 393, pp. 453-456 (1997).
Astronomy and Astrophysics
Astrophysics
Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Clouds, Hii Regions, Emission And Reflection Nebulae, Origin, Formation, Evolution, Age, And Star Formation, Associations Of Stars In External Galaxies, Star Formation
Scientific paper
We present spectroscopic evidence of gravitational collapse in massive molecular cloud cores toward the W51 HII region complex. The NH3 (J,K)=(2,2) and (3,3) lines obtained at ~1'' angular resolution exhibit inverse P-Cygni or asymmetric profiles, suggesting inward motions of gas toward the central star. The infall motions appear to be localized to individual dense cores, contrary to the suggestion of overall collapse. The two collapsing cores are embedded in a more extended cloud of 1.6 pc. If both cores are formed out of this cloud through fragmentation, it seems that both cores are now under collapse again in making the final product: massive OB stars.
Ho Paul T. P.
Zhang Qizhou
No associations
LandOfFree
Star formation at the intermediate distances: Gravitational collapse in massive cores 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 Star formation at the intermediate distances: Gravitational collapse in massive cores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Star formation at the intermediate distances: Gravitational collapse in massive cores will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1773529