Electron-Ion Equilibration in the Merging Galaxy Cluster Abell 665

[2508.15138] Electron-Ion Equilibration in the Merging Galaxy Cluster Abell 665 Skip to main content We gratefully acknowledge support from the Simons Foundation, member institutions , and all contributors.
Abell 665 is one of only a few clusters with such a powerful shock ($M \sim 3$) and provides a unique opportunity to study the thermalization timescale of the ICM, particularly the electron-ion equilibration timescale.
These results add to our understanding of the microphysics governing how thermal energy is distributed in diffuse plasmas like the ICM, with implications for galaxy cluster evolution, large scale structure formation, and cosmology.
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