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Paper: GRAMS Evolved Star Mass-Loss Models: CMDs, CCDs, and Stellar Population Analysis for the LMC
Volume: 445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants
Page: 457
Authors: Sargent, B.; Srinivasan, S.; Meixner, M.
Abstract: The Surveying the Agents of a Galaxy's Evolution (SAGE) Spitzer Space Telescope Legacy project has obtained photometry at mid-infrared wavelengths (3.6, 4.5, 5.8, 8, and 24 microns) for over 6 million stars in the Large Magellanic Cloud (LMC). Combined with optical and near-infrared photometry from other catalogs, we have assembled spectral energy distributions for >25000 evolved stars in the LMC. To model mass loss from these stars, we developed the GRAMS (Grid of RSG and AGB Models) grid using the radiative transfer code 2Dust. The grid spans the relevant ranges of parameters such as stellar effective temperature, luminosity, and dust shell optical depth. We compare observed and model photometry using color-magnitude and color-color diagrams. Finally, after obtaining stellar effective temperature, luminosity, and dust mass-loss rate for each evolved star candidate by fitting models to data, we explore mass loss in the context of stellar populations in the LMC.
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