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Large Scale Structure and Kinematics of the Orion Ridge

Published online by Cambridge University Press:  12 April 2016

J. J. Wiseman  and
P. T. P. Ho
J. J. Wiseman
Affiliation:
Harvard-Smithsonian Center for Astrophysics
P. T. P. Ho
Affiliation:
Harvard-Smithsonian Center for Astrophysics

Extract

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Clumps and filamentary structures have previously been observed in the extended molecular ridge of OMC-1 (see below). The region is affected by multiple outflow components, shock emission that extends 0.5 pc from the BN/KL core, and a foreground HII region expanding into the cloud. The region also displays a complex kinematical character, with a large scale shift in radial velocity along the ridge, multiple cloud velocity components (Womack et al. 1993), and fast gradients across constituent cores (Harris et al. 1983, Wiseman and Ho 1993).

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 (8”) angular resolution the NH3 (1,1) and (2,2) rotation-inversion lines over 20 adjacent fields covering a 3’ by 8’ region encompassing the KL region.

Type
3. Astronomical Results and Prospects
Information
International Astronomical Union Colloquium , Volume 140: Astronomy with Millimeter and Submillimeter Wave Interferometry , 1994 , pp. 234 - 235
Copyright
Copyright © Astronomical Society of the Pacific 1994

References

Harris, A., Townes, C.H., Matsakis, D.N., and Palmer, P., 1983, AP. J. (Letters),, 265, L63 Google Scholar
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Murata, Y., Kawabe, R., Ishiguro, M., Morita, K., Kasuga, T., Takáno, T., Hawegawa, T., 1990, Ap. J., 359, 125 Google Scholar
Wiseman, J.J., and Ho, P.T.P., 1993, in preparationGoogle Scholar
Womack, M., Ziurys, L.M., and Sage, L.J., 1993, Ap. J., to be publishedGoogle Scholar