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Paper detail

Cosmology with X-RAY galaxy cluster surveys ?

This talk reviews the scientific motivations, the potential difficulty and recent advances in cosmology using cluster number-counts in the X-ray band. Our forward modelling approach shows that many of the practical and conceptual shortcomings can now be overcome. We present recent results from the XMM-XXL survey. The next step is to apply artificial intelligence techniques on simulations. This allows us to bypass the unnecessarily complicated scaling relation formalism. The net gain is to significantly reduce the number of free parameters and to provide direct access both to the cosmological parameters and to truly physical ingredients, such as AGN feedback. In this way, we achieve cluster cosmology without explicit cluster mass calculation.

preprint2022arXivOpen access
Marguerite Pierre
astro-ph.CO
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Marguerite Pierre

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