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Amas de galaxies

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Reconstructed cluster bias, normalised by the Wicker et al. 2023 model, as a function of redshift (left) and mass (right).
Reconstructed cluster bias, normalised by the Wicker et al. 2023 model, as a function of redshift (left) and mass (right).

2026 · prépublication arXiv

Non-parametric estimation of the baryon gas fraction and the cosmological bias with clusters

Kim, H.†, Wicker, R., L'Huillier, B., Douspis, M., Salvati, L., Shafieloo, A.

From a model-independent expansion history reconstructed from supernovae, we infer with iterative smoothing how the hydrostatic mass bias of galaxy clusters depends on mass and redshift, using X-ray gas fractions. Reconciling clusters with CMB constraints requires this bias to evolve with time.

arXiv:2603.13763

Amas de galaxiesSupernovae IaLissage itératifAvec mes étudiants

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