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- W114438606 abstract "The color-magnitude diagrams (CMDs) of resolved stellar populations within the Local Group provide unique constraints on the cosmological models of galaxy formation. The unprecedented quality of recent CMDs, probing environments as different as the Hipparcos solar neighborhood, the dense cores of globular clusters and the diffuse, galaxy-wide samples of nearby dwarf spheroidal galaxies, requires proper techniques to infer their star formation histories. Our state-of-the-art method, based on a coupling of maximum likelihood with variational calculus, allows us to infer -for the first time- a robust, non-parametric reconstruction of the evolution of the star formation rate which gave rise to the observed CMDs. We apply our method to the best CMDs available, where crowding effects and blending are minimal. In the solar neighborhood we find evidence for a regularity of about 50 Myr in the star formation activity over the past 3 Gyr, possibly linked to interactions with spiral arms. The case of the five Local Group dwarfs studied so far shows an unexpected wide variety in their star formation histories." @default.
- W114438606 created "2016-06-24" @default.
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- W114438606 date "2002-01-01" @default.
- W114438606 modified "2023-09-25" @default.
- W114438606 title "Reconstructing Star Formation Episodes in the Local Group" @default.
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- W114438606 doi "https://doi.org/10.1007/978-94-010-0393-3_24" @default.
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