White, G. J. and Macdonald, G.H.
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Fourteen water maser sources associated with HII regions have been monitored over the period September 1974-May 1977. Time variations have been observed with a range of time-scales from days to years. A statistical analysis of the short- and long-term variations is performed and related variability in features of similar velocity is examined. The time variations must be due to changes in the pump input, geometry or other physical properties of the maser regions but at present no adequate theory exists to describe the complex behavior observed.
|Item Type:||Journal Article|
|Copyright Holders:||1979 Royal Astronomical Society|
|Keywords:||HII regions; interstellar masers; spectrum analysis; water masers; water vapor; annual variations; astronomical catalogs; physical properties; radio emission; statistical analysis; stellar evolution|
|Academic Unit/Department:||Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||G. J. White|
|Date Deposited:||28 Mar 2012 13:20|
|Last Modified:||19 Jan 2016 15:31|
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