Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986inpr.conf...29b&link_type=abstract
In NASA. Ames Research Center Summer School on Interstellar Processes: Abstracts of Contributed Papers p 29-30 (SEE N87-15043 0
Astronomy and Astrophysics
Astronomy
Astronomical Maps, Carbon Monoxide, Evolution (Development), Molecular Clouds, Morphology, Orion Constellation, Orion Nebula, Star Formation, Carbon Isotopes, Magnetic Fields, Rotation, Velocity Distribution
Scientific paper
A large scale 13CO map (containing 33,000 spectra) of the giant molecular cloud located in the southern part of Orion is presented which contains the Orion Nebula, NGC1977, and the LI641 dark cloud complex. The overall structure of the cloud is filamentary, with individual features having a length up to 40 times their width. This morphology may result from the effects of star formation in the region or embedded magnetic fields in the cloud. We suggest a simple picture for the evolution of the Orion-A cloud and the formation of the major filament. A rotating proto-cloud (counter rotating with respect to the galaxy) contians a b-field aligned with the galaxtic plane. The northern portion of this cloud collapsed first, perhaps triggered by the pressure of the Ori I OB association. The magnetic field combined with the anisotropic pressure produced by the OB-association breaks the symmetry of the pancake instability, a filament rather than a disc is produced. The growth of instabilities in the filament formed sub-condensations which are recent sites of star formation.
Bally John
Dragovan Mark
Langer William D.
Stark Alexander
Wilson Richard W.
No associations
LandOfFree
Filamentary structure in the Orion molecular cloud 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 Filamentary structure in the Orion molecular cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filamentary structure in the Orion molecular cloud will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1737795