Magnetic reconnection observations in the bow shock transition region

We investigate magnetic reconnection in the Earth's bow shock transition region using MMS observations. Reconnecting current layers with prominent current density enhancements typically have scales comparable to the ion inertial length, where electrons exhibit outflow jets and heating, while ion velocities do not have responses. Broader ion exhausts also exist, with parallel heating of ions and electrons similar to that in standard reconnection structures. We further estimate the contribution of energy conversion by reconnection with that by non-reconnecting current structures such as wave packets, and study the formation and evolution of the reconnecting current layers.