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MALT90: The Millimetre Astronomy Legacy Team 90 GHz Survey

Jackson, J. M., Rathborne, J. M., Foster, J. B., Whitaker, J. S., Sanhueza, P., Claysmith, C., Mascoop, J. L., Wienen, M., Breen, S. L., Herpin, F., Duarte Cabral, Ana ORCID:, Csengeri, T., Longmore, S. N., Contreras, Y., Indermuehle, B., Barnes, P. J., Walsh, A. J., Cunningham, M. R., Brooks, K. J., Britton, T. R., Voronkov, M. A., Urquhart, J. S., Alves, J., Jordan, C. H., Hill, T., Hoq, S., Finn, S. C., Bains, I., Bontemps, S., Bronfman, L., Caswell, J. L., Deharveng, L., Ellingsen, S. P., Fuller, G. A., Garay, G., Green, J. A., Hindson, L., Jones, P. A., Lenfestey, C., Lo, N., Lowe, V., Mardones, D., Menten, K. M., Minier, V., Morgan, L. K., Motte, F., Muller, E., Peretto, Nicolas ORCID:, Purcell, C. R., Schilke, P., Bontemps, Schneider-N., Schuller, F., Titmarsh, A., Wyrowski, F. and Zavagno, A. 2013. MALT90: The Millimetre Astronomy Legacy Team 90 GHz Survey. Publications of the Astronomical Society of Australia 30 , e057. 10.1017/pasa.2013.37

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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 1 , 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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Astronomical Society of Australia
ISSN: 1323-3580
Last Modified: 03 Nov 2022 09:35

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