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Séminaire Univers /
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« Bayesian Spectral Energy Distribution fitting and Simulation Based Inference »

Grégoire Aufort
Institut d'Astrophysique de Paris (Paris, France)

We are interested Bayesian statistics for the study of the Spectral
Energy Distributions of galaxies.
After an introduction to galaxy SED fitting, I will present a new robust
Importance Sampling algorithm and its use for Bayesian SED fitting in the
context of complete statistical model using both photometric and
spectroscopic data. I will then introduce simulation based inference and
Approximate Bayesian Computation (ABC) methods, with a model choice
application to detect recent variations in galaxy Star Formation History
in the COSMOS survey.
mardi 31 janvier 2023 - 11:00
Salle des séminaires Évry Schatzman
Institut d'Astrophysique de Paris
Pages web du séminaire / Seminar's webpage