Astronomy and Astrophysics – Astronomy
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220..203g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, May 1, 1986, p. 203-221.
Astronomy and Astrophysics
Astronomy
69
Gas Flow, Molecular Clouds, Nebulae, Protostars, Astronomical Maps, H Ii Regions, Infrared Astronomy, Interstellar Extinction, Luminosity, Stellar Mass Ejection
Scientific paper
The spatial distribution of molecular hydrogen (H2) emission in the DR21 molecular cloud has been mapped in the v = 1-0 S(1) line at 2.12 microns. The emission delineates a highly collimated, bipolar structure extending over a projected distance of about 5 pc, centered on the DR21 H II region/molecular cloud core. This is probably the most luminous and largest galactic H2 source presently known. The extended bipolar morphology and considerable luminosity in shocked H2 line emission most probably derive from the dynamical interaction of an energetic protostellar outflow with the surrounding ambient cloud medium. The contribution of a cloud-cloud collision to the observed phenomenology is suggested as a less favorable, yet viable, alternative. Line profiles measured at the positions of peak emission in both lobes show a significant difference in both shape and width. In particular, the West lobe shows emission at blue-shifted velocities which exceed the current theoretical H2 dissociation limit. The neighboring star-forming region W75S was similarly mapped in H2 line emission, and also appears to be double-structured; it is both smaller and less luminous than the DR21 source. A supersonic mass-loss flow associated with the heavily reddened young stellar object W75 (IRS1) is proposed as the driving agent for the observed shocks in this region.
Garden Ron
Gatley Ian
Geballe Thomas Ronald
Nadeau Daniel
No associations
LandOfFree
An extremely luminous bipolar H2 flow in the DR21 star-forming region 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 An extremely luminous bipolar H2 flow in the DR21 star-forming region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An extremely luminous bipolar H2 flow in the DR21 star-forming region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1774904