Millimetre Astronomy with the Australia Telescope Max Voronkov Software Scientist – ASKAP 12 th June 2009.

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Presentation transcript:

Millimetre Astronomy with the Australia Telescope Max Voronkov Software Scientist – ASKAP 12 th June 2009

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 Proposal deadlines June 15 (summer time) December 15 (mm)

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

CABB - Zoom modes (example: 1 MHz zoom)

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

NH 3 (4,4) in G (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 AU

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

Masers in G (MNRAS, 2006, 373, 411) Work by Voronkov, Brooks, Sobolev, Ellingsen, Ostrovskii, Caswell

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)

Recombination lines in G at 7mm H53  MHz CABB without zooms

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, MHz each (0.03 MHz resolution = 0.1 km/s at 3mm) or

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, MHz each Tuning ranges are GHz, GHz and GHz ( 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.

Contact Us Phone: or Web: Thank you Australia Telescope National Facility Max Voronkov Software Scientist (ASKAP) Phone: Web: 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