2018/02/06 by Navin Chandra Joshi, Naoto Nishizuka, Boris Filippov +4
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Flare #Flux (metallurgy) #Ionosphere and magnetosphere dynamics #Jet (fluid) #Kink instability #Magnetic field #Magnetic flux #Magnetohydrodynamics #Mechanics #Physics #Proper motion #Protein filament #Rope #Solar and Space Plasma Dynamics #Solar prominence #Stars #Tropical and Extratropical Cyclones Research #astro-ph.SR
paper · pdf · doi:10.1093/mnras/sty322
18 pages, 12 figures, Accepted for publication in MNRAS Jouranl
arxiv created 2018/02/06 · openalex publication_date 2018/02/06 · arxiv updated 2018/02/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We analysed a small flux rope eruption converted into a helical blowout jet in a fan-spine configuration using multiwavelength observations taken by Solar Dynamics Observatory, which occurred near the limb on 2016 January 9. In our study, first, we estimated the fan-spine magnetic configuration with the potential-field calculation and found a sinistral small filament inside it. The filament along with the flux rope erupted upwards and interacted with the surrounding fan-spine magnetic configuration, where the flux rope breaks in the middle section. We observed compact brightening, flare ribbons, and post-flare loops underneath the erupting filament. The northern section of the flux rope reconnected with the surrounding positive polarity, while the southern section straightened. Next, we observed the untwisting motion of the southern leg, which was transformed into a rotating helical blowout jet. The sign of the helicity of the mini-filament matches the one of the rotating jets. This is consistent with recent jet models presented by Adams et al. and Sterling et al. We focused on the fine thread structure of the rotating jet and traced three blobs with the speed of 60–120 km s− 1, while the radial speed of the jet is ∼400 km s− 1. The untwisting motion of the jet accelerated plasma upwards along the collimated outer spine field lines, and it finally evolved into a narrow coronal mass ejection at the height of ∼9Rsun. On the basis of detailed analysis, we discussed clear evidence of the scenario of the breaking of the flux rope and the formation of the helical blowout jet in the fan-spine magnetic configuration.