Resolving Interchange Reconnection Dynamics in a Fan-Spine-like Topology Observed by Solar Orbiter
arXiv:2512.01209 · doi:10.1051/0004-6361/202557158
Abstract
Interchange reconnection is believed to play a significant role in the production of solar jets and solar wind. However, the dynamics of interchange reconnection in the low corona might be more complex than recognized before in higher temporal and spatial resolutions. Using unprecedentedly high-resolution observations from the Extreme Ultraviolet Imager (EUI) onboard the Solar Orbiter, we analyze the dynamics of interchange reconnection in a small-scale fan-spine-like topology. Interchange reconnection that continuously occurs around the multi-null points of the fan-spine-like system exhibits a quasi-periodicity of ~200 s, nearly covering the entire evolution of this system. Continuous evolution and reversal of multiple current sheets are observed over time near the null point. These results reveal that the dynamics of interchange reconnection are likely modulated by the emerging magnetic structures, such as mini-filaments and emerging arcades. Moreover, a curtain-like feature with a width of 1.7 Mm is also observed near the interchange reconnection region and persistently generates outflows, which is similar to the separatrix curtain reported in the pseudo-streamer structure. This study not only demonstrates the complex and variable reconnection dynamics of interchange reconnection within small-scale fan-spine topology but also provides insights into the self-similarity of magnetic field configurations across multiple temporal and spatial scales.
11 pages, 7 figures, Accepted for publication in A&A
References in corpus (23)
- The Solar Orbiter mission -- Science overview
- Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
- A Breakout Model for Solar Coronal Jets with Filaments
- Imaging and spectroscopic observations of magnetic reconnection and chromospheric evaporation in a solar flare
- Sympathetic Magnetic Breakout Coronal Mass Ejections from Pseudostreamers
- On a solar blowout jet: driven mechanism and the formation of cool and hot components
- Coronal-Jet-Producing Minifilament Eruptions as a Possible Source of Parker Solar Probe (PSP) Switchbacks
- Compact solar UV burst triggered in a magnetic field with a fan-spine topology
- Round-trip Slipping Motion of the Circular Flare Ribbon Evidenced in a Fan-spine Jet
- Ultra-high-resolution Observations of Persistent Null-point Reconnection in the Solar Corona
- Observation of a reversal of breakout reconnection preceding a jet: evidence of oscillatory magnetic reconnection?
- Homologous Accelerated Electron Beams, Quasi-periodic fast-propagating Wave and CME Observed in one Fan-spine Jet
- A 2D Model for Coronal Bright Points: Association with Spicules, UV bursts, Surges and EUV Coronal Jets
- Transition from circular-ribbon to parallel-ribbon flares associated with a bifurcated magnetic flux rope
- Imaging and spectral study on the null point of a fan-spine structure during a solar flare
- Detections of Multi-Periodic Oscillations during a Circular Ribbon Flare
- Observational Signatures of Tearing Instability in the Current Sheet of a Solar Flare
- Statistical analysis of circular-ribbon flares
- Propagation of Waves above a Plage as Observed by IRIS and SDO
- Moving structures in ultraviolet bright points: observations from Solar Orbiter/EUI
- Magnetic Topology of quiet-Sun Ellerman bombs and associated Ultraviolet brightenings
- Small-scale dynamic phenomena associated with interacting fan-spine topologies: quiet-Sun Ellerman bombs, UV brightenings, and chromospheric inverted-Y-shaped jets
- 3D structures of the base of small-scale recurrent jets revealed by Solar orbiter