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A SAGE View of the Mass Losing Sources in the Large Magellanic Cloud

Abstract

We present the deepest, widest color-magnitude diagrams at mid infrared wavelengths ever produced for the Large Magellanic Cloud (LMC). The SAGE (Surveying the Agents of a Galaxy's Evolution) survey of the LMC comprises a seven by seven degree mapping of the entire LMC in each of the Spitzer IRAC and MIPS bands. The present work includes mid and near infrared photometry between 1.25 and 24 microns. These data are used to identify 100's of thousands of red giants and 10's of thousands of asymptotic giant branch stars and supergiants which are classified as oxygen rich, carbon rich, or “extreme” mass losing stars, among others. SAGE will revolutionize the study of evolved stars and mass input into the ISM in the LMC because its deep photometry is sensitive to all significant mass losing sources in the galaxy and provides the context of the overall stellar populations which give rise to the mass losing AGB stars. The SAGE data can be used to help synthesize and assess models of star forming galaxies at high redshift for a range of ages and chemical compositions.

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References

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Blum, R.D. et al. , 2006, AJ 132, 2034
Meixner, M. et al. , 2006, AJ 132, 2268
Pavlidou, & Fields, 2001, ApJ 568, 63.
vanLoon, J. Th. Loon, J. Th.; Groenewegen, M. A. T.; deKoter, A. Koter, A.; Trams, N. R.; Waters, L. B. F. M.; Zijlstra, A. A.; Whitelock, P. A. & Loup, C. 1999, A&A 351, 559
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