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Communication Dans Un Congrès Année : 2019

A hierarchical bayesian dust SED model and its application to the nearby universe

Résumé

In this paper, I review several dust evolution studies based on the DustPedia nearby galaxy sample. I first present the dust spectral energy distribution model, implementing a hierarchical Bayesian method, that we have developed. I then discuss the dust evolution trends we have derived among (integrated) and within (resolved) galaxies. In particular, we show that the trend of dust-togas ratio with metallicity is clearly non-linear, indicating the need for grain growth in the interstellar medium. Our trend is closer to the one derived with damped Lyα systems than what was suggested by previous studies. We finally demonstrate the universal processing of small amorphous carbon grains by stellar photons.
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hal-03047458 , version 1 (09-12-2020)

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Frédéric Galliano. A hierarchical bayesian dust SED model and its application to the nearby universe. Challenges in Panchromatic Modelling with Next Generation Facilities. Conference of the International Astronomical Union, Nov 2018, Osaka, Japan. pp.138-142, ⟨10.1017/S1743921319002394⟩. ⟨hal-03047458⟩
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