Abstract
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 of MALT-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 H53α radio recombination line, non-vibrationally excited SiO (1-0) and emission in the CH3OH 11-00 A+ line
Original language | English |
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Pages (from-to) | 469-481 |
Number of pages | 13 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 429 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2013 |
Externally published | Yes |
Keywords
- Galaxy: structure
- Ism: molecules
- Masers
- Radio lines: Ism
- Stars: formation
- Surveys