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MALT90: The millimetre astronomy legacy team 90 GHz survey

journal contribution
posted on 2023-05-17, 21:57 authored by Jackson, JM, Rathborne, JM, Foster, JB, Whitaker, JS, Sanhueza, P, Claysmith, C, Mascoop, JL, Wienen, M, Breen, SL, Herpin, F, Duarte-Cabral, A, Csengeri, T, Longmore, SN, Contreras, Y, Indermuele, B, Barnes, PJ, Walsh, AJ, Cunningham, MR, Brooks, KJ, Britton, TR, Voronkov, MA, Urquhart, JS, Alves, J, Jordan, CH, Hill, T, Hoq, S, Finn, SC, Bains, I, Bontemps, S, Bronfman, L, Caswell, JL, Deharveng, L, Simon EllingsenSimon Ellingsen, Fuller, GA, Garay, G, Green, JA, Hindson, L, Jones, PA, Lenfestey, C, Lo, N, Lowe, V, Mardones, D, Menten, KM, Minier, V, Morgan, LK, Motte, F, Muller, E, Peretto, N, Purcell, CR, Schilke, P, Bontemps, S-N, Schuller, F, Titmarsh, AM, Wyrowski, F, Zavagno, A
The Millimetre Astronomy Legacy Team 90 GHz (MALT90) survey aims to characterise the physical and chemical evolution of high-mass star-forming clumps. Exploiting the unique broad frequency range and on-the-fly mapping capabilities of the Australia Telescope National Facility Mopra 22 m single-dish telescope, MALT90 has obtained 3′ × 3′ maps towards ~2 000 dense molecular clumps identified in the ATLASGAL 870 μm Galactic plane survey. The clumps were selected to host the early stages of high-mass star formation and to span the complete range in their evolutionary states (from prestellar, to protostellar, and on to regions and photodissociation regions). Because MALT90 mapped 16 lines simultaneously with excellent spatial (38 arcsec) and spectral (0.11 km s−1) resolution, the data reveal a wealth of information about the clumps’ morphologies, chemistry, and kinematics. In this paper we outline the survey strategy, observing mode, data reduction procedure, and highlight some early science results. All MALT90 raw and processed data products are available to the community. With its unprecedented large sample of clumps, MALT90 is the largest survey of its type ever conducted and an excellent resource for identifying interesting candidates for high-resolution studies with ALMA.

History

Publication title

Publications of the Astronomical Society of Australia

Volume

30

Article number

e057

Number

e057

Pagination

1-13

ISSN

1448-6083

Department/School

School of Natural Sciences

Publisher

Cambridge University Press

Place of publication

United Kingdom

Rights statement

Copyright 2013 Astronomical Society of Australia

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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