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Evolution of Mid-Infrared Excess around Sun-like Stars: Constraints on Models of Terrestrial Planet Formation
We report observations from the Spitzer Space Telescope regarding the frequency of 24 μm excess emission toward Sun-like stars. Our unbiased sample is composed of 309 stars with masses 0.7-2.2 M☉ and ages from <3 Myr to >3 Gyr that lack excess emission at wavelengths ≤8 μm. We identify 30 …