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The Brightness Distribution of Ori a at 4.1 Mm in the 101–000 Line of Para-Formaldehyde and in the Continuum

Published online by Cambridge University Press:  14 August 2015

Norio Kaifu ,
Tetsuo Iguch  and
Masaki Morimoto
Norio Kaifu
Affiliation:
University of Tokyo, Tokyo, Japan
Tetsuo Iguch
Affiliation:
University of Tokyo, Tokyo, Japan
Masaki Morimoto
Affiliation:
Tokyo Astronomical Observatory, Tokyo, Japan

Abstract

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The 4.1-mm continuum emission shows a peak at the Trapezium stars and an extension to the west, where the molecular and IR sources are. The 4-mm line of para-formaldehyde has a similar distribution to that of the 3-mm line of HCN and extends more to the north than the 2-mm line of ortho-formaldehyde. This probably means a lower temperature in the northern part of the cloud.

Type
Part 2: Galactic H ii Regions
Information
Symposium - International Astronomical Union , Volume 60: Galactic Radio Astronomy , 1974 , pp. 233 - 237
Copyright
Copyright © Reidel 1974 

References

Snyder, L. E. and Buhl, D.: 1971, Astrophys. J. Letters 163, L47.Google Scholar
Thaddeus, P., Wilson, R. W., Kunter, M., Penzias, A. A., and Jefferts, K. B.: 1971, Astrophys. J. Letters 168, L59.Google Scholar