Water masers within the G 333.2-0.6 giant molecular cloud

S. L. Breen, S. P. Ellingsen, M. Johnston-Hollitt, S. Wotherspoon, I. Bains, M. G. Burton, M. Cunningham, N. Lo, C. E. Senkbeil, T. Wong

Research output: Contribution to journalArticlepeer-review


We report the results of a blind search for 22 GHz water masers in two regions, covering approximately half a square degree, within the G 333.2-0.6 giant molecular cloud. The complete search of the two regions was carried out with the 26 m Mount Pleasant radio telescope and resulted in the detection of nine water masers, five of which are new detections. Australia Telescope Compact Array (ATCA) observations of these detections have allowed us to obtain positions with arcsecond accuracy, allowing meaningful comparison with infrared and molecular data for the region. We find that for the regions surveyed there are more water masers than either 6.7 GHz methanol, or main-line OH masers. The water masers are concentrated towards the central axis of the star formation region, in contrast to the 6.7 GHz methanol masers which tend to be located near the periphery. The colours of the GLIMPSE point sources associated with the water masers are slightly less red than those associated with methanol masers. Statistical investigation of the properties of the 13CO and 1.2 mm dust clumps with and without associated water masers shows that the water masers are associated with the more massive, denser and brighter 13CO and 1.2 mm dust clumps. We present statistical models that can predict those 13CO and 1.2 mm dust clumps likely to have associated water masers.

Original languageEnglish (US)
Pages (from-to)144-145
Number of pages2
JournalProceedings of the International Astronomical Union
Issue numberS242
StatePublished - Mar 2007
Externally publishedYes


  • ISM: molecules
  • Masers
  • Radio lines: general
  • Stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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