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- W3206028513 abstract "We derive constraints on a coupled quintessence model with pure momentum exchange from the public $sim$1000 deg$^2$ cosmic shear measurements from the Kilo-Degree Survey and the $it{Planck}$ 2018 Cosmic Microwave Background data. We compare this model with $Lambda$CDM and find similar $chi^2$ and log-evidence values. We accelerate parameter estimation by sourcing cosmological power spectra from the neural network emulator $it{CosmoPower}$. We highlight the necessity of such emulator-based approaches to reduce the computational runtime of future similar analyses, particularly from Stage IV surveys. As an example, we present MCMC forecasts on the same coupled quintessence model for a $it{Euclid}$-like survey, revealing degeneracies between the coupled quintessence parameters and the baryonic feedback and intrinsic alignment parameters, but also highlighting the large increase in constraining power Stage IV surveys will achieve. The contours are obtained in a few hours with $it{CosmoPower}$, as opposed to the few months required with a Boltzmann code." @default.
- W3206028513 created "2021-10-25" @default.
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- W3206028513 date "2021-10-14" @default.
- W3206028513 modified "2023-09-27" @default.
- W3206028513 title "KiDS-1000 Cosmology: machine learning -accelerated constraints on Interacting Dark Energy with CosmoPower" @default.
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