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- W2543226304 abstract "Dust grains are an important component of the interstellar medium (ISM) of galaxies. We present the first direct measurement of the residence times of interstellar dust in the different ISM phases, and of the transition rates between these phases, in realistic hydrodynamical simulations of the multiphase ISM. Our simulations include a time-dependent chemical network that follows the abundances of H+, H, H2, C+ and CO and take into account self-shielding by gas and dust using a tree-based radiation transfer method. Supernova explosions are injected either at random locations, at density peaks, or as a mixture of the two. For each simulation, we investigate how matter circulates between the ISM phases and find more sizeable transitions than considered in simple mass exchange schemes in the literature. The derived residence times in the ISM phases are characterized by broad distributions, in particular for the molecular, warm and hot medium. The most realistic simulations with random and mixed driving have median residence times in the molecular, cold, warm and hot phase around 17, 7, 44 and 1 Myr, respectively. The transition rates measured in the random driving run are in good agreement with observations of Ti gas-phase depletion in the warm and cold phases in a simple depletion model. ISM phase definitions based on chemical abundance rather than temperature cuts are physically more meaningful, but lead to significantly different transition rates and residence times because there is no direct correspondence between the two definitions." @default.
- W2543226304 created "2016-11-04" @default.
- W2543226304 creator A5018273831 @default.
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- W2543226304 date "2017-02-09" @default.
- W2543226304 modified "2023-09-25" @default.
- W2543226304 title "The turbulent life of dust grains in the supernova-driven, multiphase interstellar medium" @default.
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- W2543226304 doi "https://doi.org/10.1093/mnras/stx341" @default.
- W2543226304 hasPublicationYear "2017" @default.
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