The resummation model in FLAMINGO: precisely predicting matter power suppression from observed halo baryon fractions

[2509.04552] The resummation model in FLAMINGO: precisely predicting matter power suppression from observed halo baryon fractions Skip to main content We gratefully acknowledge support from the Simons Foundation, member institutions , and all contributors.
Here, we present an improved version of the “resummation” model, which maps observed halo baryon fractions of massive haloes ($M_{\mathrm{500c}}\gtrsim 10^{12.5}\, \mathrm{M_\odot}$) to a flexible suppression signal – i.e.
Central to the model is a seemingly mass-independent and feedback-independent relation that allows observed halo masses to be mapped to equivalent DMO halo masses using only observed mean halo baryon fractions, to $\lesssim 1\%$ precision.
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