Onset of Magnetic Explosion in Solar Coronal Jets in Quiet Regions on the Central Disk
arXiv:2006.04253 · doi:10.3847/1538-4357/ab88ce
Abstract
We examine the initiation of 10 coronal jet eruptions in quiet regions on the central disk, thereby avoiding near-limb spicule-forest obscuration of the slow-rise onset of the minifilament eruption. From the SDO/AIA 171A 12-second-cadence movie of each eruption, we (1) find and compare the start times of the minifilament's slow rise, the jet-base bright point, the jet-base interior brightening, and the jet spire, and (2) measure the minifilament's speed at the start and end of its slow rise. From (a) these data, (b) prior observations showing that each eruption was triggered by magnetic flux cancelation under the minifilament, and (c) the breakout-reconnection current sheet observed in one eruption, we confirm that quiet-region jet-making minifilament eruptions are miniature versions of CME-making filament eruptions, and surmise that in most quiet region jets: (1) the eruption starts before runaway reconnection starts, (2) runaway reconnection does not start until the slow-rise speed is at least about 1 km/s, and (3) at and before eruption onset there is no current sheet of appreciable extent. We therefore expect: (i) many CME-making filament eruptions are triggered by flux cancelation under the filament, (ii) emerging bipoles seldom, if ever, directly drive jet production because the emergence is seldom, if ever, fast enough, and (iii) at a separatrix or quasi-separatrix in any astrophysical setting of magnetic field in low-beta plasma, a current sheet of appreciable extent can be built only dynamically by a magnetohydrodynamic convulsion of the field, not by quasi-static gradual converging of the field.
arXiv comment20 pages, 11 figures and 1 table; Published in ApJ
References in corpus (21)
- A Model for Solar Coronal Mass Ejections
- Solar Coronal Jets: Observations, Theory, and Modeling
- Small-scale filament eruptions as the driver of solar coronal hole X-ray jets
- On a Coronal Blowout Jet: The First Observation of a Simultaneously Produced Bubble-like CME and a Jet-like CME in a Solar Event
- Characteristics of EUV coronal jets observed with STEREO/SECCHI
- JHelioviewer - Time-dependent 3D visualisation of solar and heliospheric data
- Magnetic Flux Cancellation as the Trigger of Solar Quiet-Region Coronal Jets
- Twisting solar coronal jet launched at the boundary of an active region
- Magnetic Flux Cancelation as the Trigger of Solar Coronal-Hole Coronal Jets
- Magnetic Flux Cancelation as the Origin of Solar Quiet Region Pre-Jet Minifilaments
- Coronal hole boundaries at small scales: IV. SOT view Magnetic field properties of small-scale transient brightenings in coronal holes
- Solar Active Region Coronal Jets II: Triggering and Evolution of Violent Jets
- IRIS and SDO Observations of Solar Jetlets Resulting from Network-Edge Flux Cancelation
- Fine-scale explosive energy release at sites of prospective magnetic flux cancellation in the core of the solar active region observed by Hi-C 2.1, IRIS and SDO
- Homologous Jet-Driven Coronal Mass Ejections From Solar Active Region 12192
- Hi-C 2.1 Observations of Jetlet-like Events at Edges of Solar Magnetic Network Lane
- Observations of solar X-ray and EUV jets and their related phenomena
- Magnetic Flux Cancelation as the Buildup and Trigger Mechanism for CME-Producing Eruptions in two Small Active Regions
- Magnetic Flux Cancellation as the Trigger Mechanism of Solar Coronal Jets
- Onset of the magnetic explosion in solar polar coronal X-ray jets
- Blowout Jets and Impulsive Eruptive Flare in a Bald-Patch Topology
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- Observation and Modeling of Solar Jets
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- A Comprehensive Radiative Magnetohydrodynamics Simulation of Active Region Scale Flux Emergence from the Convection Zone to the Corona
- Another Look at Erupting Minifilaments at the Base of Solar X-Ray Polar Coronal "Standard" and "Blowout" Jets
- Genesis and Coronal-jet-generating Eruption of a Solar Minifilament Captured by IRIS Slit-raster Spectra
- Chromospheric and coronal heating and jet acceleration due to reconnection driven by flux cancellation. I. At a three-dimensional current sheet
- Quasi-periodic microjets driven by granular advection as observed with high-resolution imaging at He I 10830 Å
- Further Evidence for the Minifilament-Eruption Scenario for Solar Polar Coronal Jets
- Bipolar Ephemeral Active Regions, Magnetic Flux Cancellation, and Solar Magnetic Explosions
- High-resolution spectroscopy of an erupting minifilament and its impact on the nearby chromosphere
- High-resolution He I 10830 Å narrowband imaging for precursors of chromospheric jets and their quasi-periodic properties
- Observations of Mini Coronal Dimmings Caused by Small-scale Eruptions in the Quiet Sun
- What Causes Faint Solar Coronal Jets from Emerging Flux Regions in Coronal Holes?