In-situ Switchback Formation in the Expanding Solar Wind
In-situ Switchback Formation in the Expanding Solar Wind
Recent near-sun solar-wind observations from Parker Solar Probe have found a highly dynamic magnetic environment, permeated by abrupt radial-field reversals, or "switchbacks." We show that many features of the observed turbulence are reproduced by a spectrum of Alfv\'enic fluctuations advected by a radially expanding flow. Starting from simple superpositions of …