Pilot observations for MALT-45: a Galactic plane survey at 7 mm
MetadataShow full item record
We introduce the Millimetre Astronomer’s Legacy Team – 45 GHz (MALT-45) Galactic plane survey and describe pilot survey results with the Australia Telescope Compact Array (ATCA).The pilot survey was conducted to test the instrumentation and observational technique ofMALT-45, before commencing the full survey. We mapped two half-square degree regions within the southern Galactic plane around the G333 giant molecular cloud, using fast mosaic mapping. Using the new Compact Array Broad-band Backend on the ATCA, we were able to observe two 2048MHzspectral windows, centred on frequencies 43.2 and 48.2 GHz. Although only a coarse spectral resolution of around 7 km s-1 was available to us, we detect widespread, extended emission in the CS (1–0) ground state transition. We also detect eight Class I CH3OH masers at 44 GHz and three SiO masers in vibrationally excited (1–0) transitions. We also detect the H53a radio recombination line, non-vibrationally excited SiO (1–0) and emission in the CH3OH 11–00 A+ line.
Copyright © 2012 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society
Showing items related by title, author, creator and subject.
Chenrai, Piyaphong (2008)The Comet Gold Mine is in the Murchison mineral field which lies within the Yilgarn Craton of Western Australia. Several different geophysical methods were used in this study to define the geophysical signatures of ...
Macquart, Jean-Pierre (2014)We investigate the optimal tradeoff between sensitivity and field of view in surveys for slow radio transients using the event detection rate as the survey metric. This tradeoff bears implications for the design of surveys ...
A study of business risks of public housing construction in Hong Kong and risk management methods adopted by contractorsLee, Kin-wang (2004)The research conducted in this thesis studies the business risks considered as critical by construction contractors in the public housing construction industry in Hong Kong and the risk management methods adopted by these ...