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    Pilot observations for MALT-45: a Galactic plane survey at 7 mm

    193783_98838_Pilot_Obs.pdf (19.15Mb)
    Access Status
    Open access
    Authors
    Jordan, C.
    Walsh, Andrew
    Lowe, V.
    Lo, N.
    Purcell, C.
    Voronkov, M.
    Longmore, S.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Jordan, C.H. and Walsh, A.J. and Lowe, V. and Lo, N. and Purcell, C.R. and Voronkov, M.A. and Longmore, S.N. 2013. Pilot observations for MALT-45: a Galactic plane survey at 7 mm. Monthly Notices of the Royal Astronomical Society. 429 (1): pp. 469-481.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/sts350
    ISSN
    0035-8711
    Remarks

    Copyright © 2012 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society

    URI
    http://hdl.handle.net/20.500.11937/4770
    Collection
    • Curtin Research Publications
    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 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.

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