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High-velocity H2O maser emission from the post-asymptotic-giant-branch star OH 009.1-04


Walsh, AJ and Breen, SL and Bains, I and Vlemmings, WHT, High-velocity H2O maser emission from the post-asymptotic-giant-branch star OH 009.1-04, Monthly Notices of the Royal Astronomical Society, 394, (1) pp. L70-L73. ISSN 0035-8711 (2009) [Refereed Article]

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DOI: doi:10.1111/j.1745-3933.2008.00613.x


Observations of H2O masers towards the post-asymptotic-giant-branch star and water fountain source OH 009.1−0.4 were made as part of The H2O southern galactic Plane Survey, with the Mopra radiotelescope. Together with followup observations using the Australia Telescope Compact Array (ATCA), we have identified H2O maser emission over a velocity spread of nearly 400 km s −1 (− 109 to +289 km s−1). This velocity spread appears to be the largest of any known maser source in our Galaxy. High-resolution observations with the ATCA indicate that the maser emission is confined to a region 0.3 × 0.3 arcsec and shows weak evidence for a separation of the red- and blueshifted maser spots. We are unable to determine if the water fountain is projected along the line of sight, or is inclined, but either way OH 009.1−0.4 is an interesting source, worthy of followup observations.

Item Details

Item Type:Refereed Article
Keywords:masers-stars:AGB and post-AGB
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Breen, SL (Dr Shari Breen)
ID Code:57516
Year Published:2009
Web of Science® Times Cited:19
Deposited By:Physics
Deposited On:2009-07-23
Last Modified:2010-03-25

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