Large Scale Structure and Kinematics of the Orion Ridge

Details Large Scale Structure and Kinematics of the Orion Ridge Large Scale Structure and Kinematics of the Orion Ridge

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.3710w&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #37.10; Bulletin of the American Astronomical Society, Vol. 25, p.855

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a high resolution VLA study of the 0.5 pc extended OMC-1 molecular ridge surrounding the Orion BN/KL core of high mass star formation. Molecular streamers based in the BN/KL core region have previously been reported in this region. To clarify the structure and kinematics of the region, we have used the VLA to observe with high (0.3 km s(-1) ) velocity resolution and high (9'') angular resolution the NH_3 (1,1) and (2,2) rotation-inversion lines over 10 adjacent fields covering a 3' by 5' region encompassing the Kleinman-Low (KL) nebula. We present a linear mosaic of these fields, which show an abundance of structural, kinematical, and temperature information. Techniques and challenges encountered while mosaicing the interferometric maps are discussed. We find evidence of extended clumpy filaments. The component fragments display velocity gradients in varying directions; some may be sites of young stars or collapsing cores which have not yet shed their angular momentum. We also find material with velocities differing by more than 2 km s(-1) present within small projected areas, complicating simple global rotation models for OMC-1. These bimodal velocity components appear to overlap in the BN/KL active core region, suggesting cloud collision as a possible triggering mechanism. We also present a temperature map of the ridge. There is evidence for large scale (0.5 pc) outflows originating from the KL core and extending along the filaments, with possible interaction. We discuss the likelihood of instability and fragmentation along the filaments. These observations provide an interesting case study of the active interaction between a core of high mass star formation and its molecular cloud environment.

Affiliated with

Also associated with

No associations

Rating

Large Scale Structure and Kinematics of the Orion Ridge 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 Large Scale Structure and Kinematics of the Orion Ridge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large Scale Structure and Kinematics of the Orion Ridge will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1849063