Speaker
Description
Galaxy groups and clusters retain a fossil record of their formation history in the chemical composition of their hot intragroup and intracluster gas. Upcoming high-resolution X-ray missions, such as Athena’s X-IFU, will provide spatially resolved abundance measurements for multiple elements. In this work, I combine the cosmological hydrodynamical simulation Simba-C, which incorporates the Chem5 chemical-enrichment model, with an updated mock X-ray pipeline to predict Athena-like elemental abundances for galaxy groups and clusters.
Using the MOXHA framework, I generate synthetic Athena X-IFU observations for 150 Simba-C haloes spanning the entire group–cluster mass range. We analyse the resulting spectra with Bayesian spectral fitting using BXA+XSPEC, modelling the hot gas as an optically thin thermal plasma. This yields “observed” X-ray temperatures and elemental abundances (O, Ne, Mg, Si, S, Ar, Fe, Ni) with full posterior uncertainties, directly comparable to present and future X-ray surveys. I will present the methodology and first results on global abundance ratios and their trends with halo mass and redshift in Simba-C.
| Stream | Science or Engineering |
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