Efficiency of sloshing-driven thermal redistribution

Determine the efficiency of mixing and sloshing-driven transport in redistributing thermal energy over the full cooling volume of the Abell 2029 cool core.

Background

The paper distinguishes ordered bulk motions associated with gas sloshing from the relatively modest unresolved turbulent velocity dispersion in the core of Abell 2029. Although turbulent dissipation alone is estimated to be insufficient to offset radiative cooling, sloshing-driven advection, mixing, and transport of higher-entropy gas could still redistribute thermal energy.

The authors explicitly state that their spatially resolved measurements do not directly test the proposed mixing-heating scenario and leave uncertain how effective these processes are across the entire cooling volume. Resolving this issue would clarify whether gas motions can materially contribute to the thermal balance of the cool core beyond direct turbulent dissipation.

References

Although these results do not directly test the mixing-heating scenario, gas motions may still contribute to thermal redistribution through mixing and sloshing-driven transport. The efficiency of these processes over the full cooling volume, however, remains uncertain.

— XRISM reveals sloshing-driven gas motions in the core of Abell 2029  (2608.14415 - Uchida et al., 14 Aug 2026) in Section 4.4, “Implications for ICM heating and cooling”