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Paper: Estimation of the Dust Mass-Loss Rates from AGB Stars in the Fornax and Sagittarius Dwarf Spheroidal Galaxies
Volume: 378, Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes
Page: 268
Authors: Lagadec, E.; Zijlstra, A.A.; Matsuura, M.; Whitelock, P.A.; van Loon, J.Th.
Abstract: To study the effect of metallicity on the mass-loss of AGB stars, we have conducted mid-infrared photometric measurements of AGB stars in the Sagittarius and Fornax dwarf spheroidal galaxies ([Fe/H] = 1.1 and 1.3) with the 10 μm camera visir at the VLT. These observations, combined with previous near-infrared photometric measurements, allow us to estimate mass-loss rates in these galaxies. We show here that the observed AGB stars display dust-driven mass-loss. Dust mass-loss rates are found to be in the range 610−10 4.410−8 M yr−1 for the observed AGB stars in SgrD and around 210−8 M yr−1 for the star observed in Fornax.
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