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Measuring the lifecycle of baryonic matter in the Large Magellanic Cloud with the Spitzer SAGE-LMC survey

Published online by Cambridge University Press:  01 July 2008

Margaret Meixner ,
Jean-Philippe Bernard ,
Robert D. Blum ,
Remy Indebetouw ,
William Reach ,
Sundar Srinivasan ,
Marta Sewilo  and
Barbara A. Whitney
Margaret Meixner
Affiliation:
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21093, USA email: [email protected], [email protected]
Jean-Philippe Bernard
Affiliation:
Direction de la Recherche, Centre dEtude Spatiale des Rayonnements, 18Avenue Edouard Belin, Toulouse, Cedex F-31055, France email: [email protected]
Robert D. Blum
Affiliation:
NOAO, PO Box 26732, Tucson AZ 85726-6732, USA email: [email protected]
Remy Indebetouw
Affiliation:
Depart. of Astronomy, University of Virginia, PO Box 3818, Charlottesville, VA 22903, USA email: [email protected]
William Reach
Affiliation:
Spitzer Science Center, California Institute of Technology, 220-6, Pasadena, CA, 91125, USA email: [email protected]
Sundar Srinivasan
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, 3400 North Charles St., Baltimore, MD 21218, USA email: [email protected]
Marta Sewilo
Affiliation:
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21093, USA email: [email protected], [email protected]
Barbara A. Whitney
Affiliation:
Space Science Institute, 4750 Walnut St. Suite 205, Boulder, CO 80301, USA email: [email protected]
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Abstract

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The recycling of matter between the interstellar medium (ISM) and stars are key evolutionary drivers of a galaxy's baryonic matter. The Spitzer wavelengths provide a sensitive probe of circumstellar and interstellar dust and hence, allow us to study the physical processes of the ISM, the formation of new stars and the injection of mass by evolved stars and their relationships on the galaxy-wide scale of the LMC. Due to its proximity, favorable viewing angle, multi-wavelength information, and measured tidal interactions with the Small Magellanic Cloud (SMC), the LMC is uniquely suited for surveying the agents of a galaxy's evolution (SAGE), the ISM and stars. The SAGE-LMC project is measuring these key transition points in the life cycle of baryonic matter in the LMC. Here we present a connective view of the preliminary quantities estimated from SAGE-LMC for the total mass of the ISM, the galaxy wide star formation rate and the current stellar mass loss return. For context, we compare these numbers to the LMC's stellar mass.

Keywords

surveysstars: AGB and post-AGBcircumstellar matterstars: formationstars: mass lossdustextinctionISM: evolutiongalaxies: evolutiongalaxies: individual (LMC)Magellanic Clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S256: The Magellanic System: Stars, Gas, and Galaxies , July 2008 , pp. 3 - 8
Copyright
Copyright © International Astronomical Union 2009

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