There is renewed interest in heliospheric physics following the recent exploration of the pristine solar wind by the Parker Solar Probe. Magnetic switchback structures are frequently observed in the inner heliosphere, but there are open questions about their origin. Many researchers are investigating the statistical properties of switchbacks and their relationships with wave modes, stream types and solar activity, but the sources of switchbacks remain elusive. Here we report that interplanetary switchbacks originate from magnetic reconnection on the Sun that occurs at chromospheric network boundaries and launch solar jet flows. We link in situ interplanetary measurements and remote-sensing solar observations to establish a connection between interplanetary switchbacks and their solar source region, featuring solar jets, chromospheric network boundaries and photospheric magnetic field evolution. Our findings suggest that joint observations of switchbacks and solar jets provide a better estimate of the contribution of magnetic reconnection to coronal heating and solar wind acceleration.

随着帕克太阳探测器最近对原始太阳风的探索，人们对日光层物理学重新产生了兴趣。磁之字形结构经常在内日光层中被观察到，但其起源仍存在悬而未决的问题。许多研究人员正在研究之字形的统计特性及其与波浪模式、河流类型和太阳活动的关系，但之字形的来源仍然难以捉摸。在这里，我们报告说，行星际之字形源于太阳上的磁重联，发生在色球网络边界并发射太阳射流。我们将原位行星际测量和遥感太阳观测联系起来，在行星际之字线与其太阳源区域之间建立联系，以太阳喷流、色球网络边界和光球磁场演化为特征。我们的研究结果表明，对之字形和太阳喷流的联合观测可以更好地估计磁重联对日冕加热和太阳风加速的贡献。