Astron. Astrophys. 360, 49-56 (2000)

Acknowledgements

The authors acknowledge helpful discussions with and comments from Drs. S. Kameno, M. Miyoshi, S. Deguchi, J. Conway, K. Menten and W. Baan. Y.H. thanks the Foundation for the Promotion of Astronomy of Japan for travel support to visit NRAO, Socorro for the data analysis. We would also like to thank the referee, Huib Jan van Langevelde for a careful and critical reading of the text. The National Radio Astronomy Observatory is operated by Associated Universities, Inc. (AUI), under cooperative agreement with the National Science Foundation. This paper represents a part of Y.H. 's Ph. D thesis, submitted to the Graduate University for Advanced Studies, Mitaka, Japan.

© European Southern Observatory (ESO) 2000

Online publication: July 27, 2000
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