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Time Variations of Interstellar Water Masers in HII Regions

Published online by Cambridge University Press:  14 August 2015

G.J. White  and
G.H. Macdonald
G.J. White
Affiliation:
1Physics Dept., Queen Mary College, University of London, U.K.
G.H. Macdonald
Affiliation:
2Electronics Laboratory, University of Kent at Canterbury, U.K.

Extract

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Previous studies of time variations in water vapour sources associated with HII regions by Sullivan (1971, 1973) and Gammon (1976) have revealed variability on time-scales of 106-107s. Sullivan monitored nine sources over a period of 14 months and Gammon observed W49 (H2O) for 13 months. In an attempt to gather more complete information on the variability of interstellar water masers we have monitored 18 sources for the 32-month period 1974 September-1977 May. The sources selected are listed in Table 1. They were the strongest known at the beginning of the programme above declination −20°.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 87: Interstellar Molecules , 1980 , pp. 593 - 598
Copyright
Copyright © Reidel 1980 

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