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How common is reconnection in a turbulent plasma? G. Stenberg, M. André, A. Vaivads, Yu. V. Khotyaintsev (IRF, Uppsala) Retinò (Austrian Academy of Sceince, Graz) E. Lucek, (Imperial College, London)

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Magnetic reconnection (large-scale structures) Magnetosphere (e.g. Paschmann, Nature, 1979) Solar wind (e.g. Phan, Nature, 2006)

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Magnetic reconnection (small-scale structures, in turbulence) Turbulence (in the magnetosheath) (Retinò et al. Nature Phys., 2007) (Sundkvist et al., PRL, 2007)

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Statistics Reconnection in turbulence (in the magnetosheath)

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Details Current sheet in turbulence (Stenberg, subm. to Phys. Rev. Lett.)

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70 current sheets Reconnection No reconnection Reconnection No reconnection ~58% Average: 10 -12 to 10 -11 W/m 3

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Reconnection Simulation MHD turbulence (Servidio et al. Phys. Rev. Lett., 2009)

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Conclusions Reconnection is common in turbulence (58% of 70 current sheets) Reconnection rate is high, 0.3 (consistent with simulations) Dissipation in current sheet 1-210 -10 W/m 3 giving on average 10 -12 to 10 -11 W/m 3

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