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Millimetre Astronomy with the Australia Telescope Max Voronkov Software Scientist – ASKAP 12 th June 2009
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Australia Telescope at mm: ATCA and Mopra Good set of receivers: 12mm, 7mm and 3mm Mopra up to 117 GHz Broadband backends available! Application for time via http://opal.atnf.csiro.au Proposal deadlines June 15 (summer time) December 15 (mm)
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CABB - Present mm capabilities More channels (16384) over each 2 GHz sub-band are technically feasible, but the timescale of implementation is uncertain at present
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CABB - Zoom modes (example: 1 MHz zoom)
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CABB - Zoom modes The width of a filter bank channel is the width of each zoom window Coarse resolution of the wide sub-band = bandwidth of 1 zoom window Stitching is possible (seamless, if interleaved windows are used) Initially up to 4 zoom windows per each 2 GHz sub-band Eventually up to 16 zooms per sub-band will be available Each 2 GHz sub-band (and all its zooms) can have different resolution ResolutionVelocity ResolutionVelocity coverage WideZoom3mm7mm12mm3mm7mm12mm MHzkHzm/skm/s 10.51.63.87.13.17.514.3 426.3152912.63057 168256011451120229 6432101240457202480914
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NH 3 (4,4) in G351.77-0.54 (pre-CABB) Work by Beuther, Walsh and Longmore Zero-order (contours) and first-order (colour scale) moment maps Clear indication of rotation, but no signs of flattening Rotating surrounding envelope, rather than a disc The major axis is roughly 10000 AU
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Search for CH 3 CH 2 OCH 3 (ethyl methyl ether) 7mm pre-CABB work by Jones, Cunningham et al. Lines detected, but no correct brightness pattern with other transitions has been found. So identification may be incorrect. Sgr B2-M Sgr B2-N
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Masers in G343.12-0.06 (MNRAS, 2006, 373, 411) Work by Voronkov, Brooks, Sobolev, Ellingsen, Ostrovskii, Caswell
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CABB observations of NGC6334I at 3mm Work by Brooks, Titmarsh, Voronkov, Urquhart done as part of the CABB science commissioning 3mm continuum (contours) and C 34 S (2-1) (grayscale)
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Recombination lines in G19.61-0.23 at 7mm H53 42951.47 MHz CABB without zooms
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Mopra - a complementary single dish See Tui Britton’s poster on BHR71 for a science example Similar set of receivers (but can go up to 117 GHz) Wide-band spectrometer (UNSW-MOPS) available (for a few years by now) Available modes: Broad-band mode continuous coverage of 8.3 GHz (0.25 MHz resolution = 0.8 km/s at 3mm) Zoom mode 16 windows, 137.5 MHz each (0.03 MHz resolution = 0.1 km/s at 3mm) or
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Summary ATCA and Mopra are very powerful Southern hemisphere instruments thanks to the new broadband capabilities CABB: two 2 GHz sub-bands within 8 GHz, optional zoom modes MOPS: either 8 GHz broad band or 16 zooms, 137.5 MHz each Tuning ranges are 16-27 GHz, 30-50 GHz and 83.5-106 GHz (76-117 GHz for Mopra) A number of large surveys are already under way or planned There is a potential for collaboration, contact the relevant PI if you’re interested. Mopra HOPS, all Galactic plane at 12mm (Andrew Walsh) Mopra MALT-90 at 3mm (Jim Jackson) Mopra MALT-7mm (Gary Fuller), ATCA-7mm (Andrew Walsh) ATCA follow-up of the MMB survey detections at 7mm (myself) Proposal deadline is only a few days away (June 15)! This deadline is for the next Oz summer, but night time is usually fine for 12mm and 7mm observations.
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Contact Us Phone: 1300 363 400 or +61 3 9545 2176 Email: enquiries@csiro.au Web: www.csiro.au Thank you Australia Telescope National Facility Max Voronkov Software Scientist (ASKAP) Phone: 02 9372 4427 Email: maxim.voronkov@csiro.au Web: http://www.narrabri.atnf.csiro.au/~vor010 Thanks to the following people for their contribution to the content of this presentation: P.Edwards, K.Brooks, S.Longmore, P.Jones, A.Walsh, M.Cunningham, T.Britton, S.Ellingsen, J.Caswell, A.Titmarsh, D.Ferris, D.McConnell, W.Wilson, J.Chapman
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