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Results of the Monitoring of a Very Strong Water Maser Event in W49N

Published online by Cambridge University Press:  07 August 2017

E. Scalise Jr ,
G. M. Pacheco ,
A.M. Gómez Balboa  and
Z. Abraham
E. Scalise Jr
Affiliation:
SCT - INPE, CP 515, 12201 S.J. Campos, São Paulo;
G. M. Pacheco
Affiliation:
SCT - INPE, CP 515, 12201 S.J. Campos, São Paulo;
A.M. Gómez Balboa
Affiliation:
CNPq - ON, CP 23002, 20921 Rio de Janeiro;
Z. Abraham
Affiliation:
USP - IAG, CP 9638, 04301 São Paulo. BRASIL

Abstract

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Since the discovery of the 616-523 rotational transition of interstellar water in maser emission, several hundred sources have been discovered. Their profiles are very variable, presenting correlated variability (Gammon, 1976) or anticorrelated variability (Cesaroni, 1990). Several models have been proposed to explain this variability. Strong Galactic masers, such as W49 and W51 (Kylafis et al. 1991), and also an extremely strong outburst detected by Abraham et al. (1981) in Orion, could not be fully explained based on current models. We have monitored from October 1989 to July 1991 a very strong water vapour eruption in the +28 km s−1 feature, originated from W49N. Here we present the results and discuss the possible correlated variability of this feature with the one that appeared at +62 km s−1.

Type
Chemistry of Interface Regions
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 349 - 350
Copyright
Copyright © Kluwer 1992 

References

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