Ellerman Bombs with Jets: Cause and Effect

Abstract

Ellerman Bombs (EBs) are thought to arise as a result of photospheric magnetic reconnection. We use data from the Swedish 1-m Solar Telescope (SST), to study EB events on the solar disk and at the limb. Both datasets show that EBs are connected to the foot-points of forming chromospheric jets. The limb observations show that a bright structure in the H$\alpha$ blue wing connects to the EB initially fuelling it, leading to the ejection of material upwards. The material moves along a loop structure where a newly formed jet is subsequently observed in the red wing of H$\alpha$. In the disk dataset, an EB initiates a jet which propagates away from the apparent reconnection site within the EB flame. The EB then splits into two, with associated brightenings in the inter-granular lanes (IGLs). Micro-jets are then observed, extending to 500 km with a lifetime of a few minutes. Observed velocities of the micro-jets are approximately 5-10 km s${}^{-1}$, while their chromospheric counterparts range from 50-80 km s${}^{-1}$. MURaM simulations of quiet Sun reconnection show that micro-jets with similar properties to that of the observations follow the line of reconnection in the photosphere, with associated H$\alpha$ brightening at the location of increased temperature.

9 pages, 9 figures, 2 supplementary movies. Accepted to ApJ

References in corpus (17)

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Cited by in corpus (15)

• Solar ultraviolet bursts
• Magnetic Flux Cancellation in Ellerman Bombs
• Reconnection brightenings in the quiet solar photosphere
• IRIS Burst Spectra Co-Spatial To A Quiet-Sun Ellerman-Like Brightening
• Flame-like Ellerman Bombs and Their Connection to Solar UV Bursts
• On The Relationship Between Magnetic Cancellation and UV Burst Formation
• Multi-wavelength Spectral Analysis of Ellerman Bombs Observed by FISS and IRIS
• Solar Ellerman Bombs in 1-D Radiative Hydrodynamics
• RADYN simulations of non-thermal and thermal models of Ellerman bombs
• Automating Ellerman bomb detection in ultraviolet continua
• Signatures of quiet Sun reconnection events in Ca~{\sc ii}, H$\alpha$ and Fe~{\sc i}
• Spatially resolved signatures of bi-directional flows observed in inverted-Y shaped jets
• Chromospheric Inversions of a Micro-flaring Region
• Flows and magnetic field structures in reconnection regions of simulations of the solar atmosphere: do flux pile-up models work?
• A multi-instrument study of ultraviolet bursts and associated surges in AR 12957