Magnetosheath jet evolution as a function of lifetime: global hybrid-Vlasov simulations compared to MMS observations

Abstract. Magnetosheath jets are regions of high dynamic pressure, which can traverse from the bow shock towards magnetopause. Recent modelling efforts, limited to a single jet and set upstream conditions, have provided first estimations about how parameters behave as function position within magnetosheath. Here we expand earlier results by doing statistical investigation dimensions their lifetime To verify simulation behaviour, identify Magnetosphere Multiscale (MMS) spacecraft data (6142 in total) confirm Vlasiator general behaviour using statistics 924 simulated individual jets. We find that quantitative agreement with observations, confirming findings related Vlasiator. The density, magnetic field intensity show sharp jump at shock, decreases appear compressive cooler than magnetosheath while during propagation magnetopause they thermalise. Further, shape flatten progress through They able maintain flow velocity direction flow, end up preferentially side behind quasi-parallel shock. Finally, low solar wind Alfvén Mach number MA shorter duration, smaller extent, weaker terms pressure compared MA.