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Physical conditions in the NGC 6334 molecular cloud derived from non-LTE NH3(J,K)=(1,1) transitions

Published online by Cambridge University Press:  03 August 2017

Anderson Caproni ,
Zulema Abraham  and
José W. S. Vilas-Boas
Anderson Caproni
Affiliation:
Instituto Astrononômico e Geofísico - Universidade de São Paulo, Av. Miguel Stéfano 4200, 04301-904 São Paulo SP Brazil
Zulema Abraham
Affiliation:
Instituto Astrononômico e Geofísico - Universidade de São Paulo, Av. Miguel Stéfano 4200, 04301-904 São Paulo SP Brazil
José W. S. Vilas-Boas
Affiliation:
Instituto Nacional de Pesquisas Espaciais, Caixa Postal 515, 12201-970 São José dos Campos SP Brazil

Abstract

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The high signal-to-noise ratio of the NH3(J,K) = (1,1) spectra from NGC 6334 have allowed at a first time a detailed study of departures from LTE conditions in this molecular cloud. Differences in the line shapes have shown that the surveyed region is composed of at least three overlapped sources in different stages of star formation. Comparison between physical parameters of NGC 6334 derived from LTE and non-LTE conditions are presented and discussed here.

Type
Part 1. Star Formation
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 240 - 243
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Caproni, A., Abraham, Z., & Vilas-Boas, J. W. S. 2000, A&A, 361, 685 Google Scholar
Cheung, L., Frogel, J. A., Gezari, D. Y., & Hauser, M. G. 1978, ApJ, 226, L149 Google Scholar
Forster, J. R., Whiteoak, J. B., & Gardner, F. F. 1987, Astron. Soc. Austr., 7 (2), 189 Google Scholar
Kuiper, T. B. H., Peters, W. L. III, Foster, J. R., Gardner, F. F., & Whiteoak, J. B. 1995, ApJ, 446, 692 Google Scholar
Matsakis, D. N., Brandshaft, D., Chui, M. F., Cheung, A. C., Yngvesson, K. S., Cardiasmenos, A. G., Shanley, J. F., & Ho, P. T. P. 1977, ApJ, 214, L67 Google Scholar
Moran, J. M., & Rodríguez, L. F. 1980, ApJ, 236, L159 Google Scholar
Stutzki, J., & Winnewisser, G. 1985, A&A, 144, 13 Google Scholar
Tapia, M., Persi, P., & Roth, M. 1996, A&A, 316, 102 Google Scholar