Pilot observations for MALT-45: a Galactic plane survey at 7 mm
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 fu...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Oxford University Press
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/4770 |
| _version_ | 1848744609286455296 |
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| author | Jordan, C. Walsh, Andrew Lowe, V. Lo, N. Purcell, C. Voronkov, M. Longmore, S. |
| author_facet | Jordan, C. Walsh, Andrew Lowe, V. Lo, N. Purcell, C. Voronkov, M. Longmore, S. |
| author_sort | Jordan, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T06:04:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-4770 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:04:11Z |
| publishDate | 2013 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-47702017-09-13T14:45:09Z Pilot observations for MALT-45: a Galactic plane survey at 7 mm Jordan, C. Walsh, Andrew Lowe, V. Lo, N. Purcell, C. Voronkov, M. Longmore, S. structure radio - lines stars Galaxy masers molecules surveys ISM formation 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. 2013 Journal Article http://hdl.handle.net/20.500.11937/4770 10.1093/mnras/sts350 Oxford University Press fulltext |
| spellingShingle | structure radio - lines stars Galaxy masers molecules surveys ISM formation Jordan, C. Walsh, Andrew Lowe, V. Lo, N. Purcell, C. Voronkov, M. Longmore, S. Pilot observations for MALT-45: a Galactic plane survey at 7 mm |
| title | Pilot observations for MALT-45: a Galactic plane survey at 7 mm |
| title_full | Pilot observations for MALT-45: a Galactic plane survey at 7 mm |
| title_fullStr | Pilot observations for MALT-45: a Galactic plane survey at 7 mm |
| title_full_unstemmed | Pilot observations for MALT-45: a Galactic plane survey at 7 mm |
| title_short | Pilot observations for MALT-45: a Galactic plane survey at 7 mm |
| title_sort | pilot observations for malt-45: a galactic plane survey at 7 mm |
| topic | structure radio - lines stars Galaxy masers molecules surveys ISM formation |
| url | http://hdl.handle.net/20.500.11937/4770 |