Ellerman Bombs with jets: cause and effect

Reid, Aaron, Mathioudakis, Mihalis, Scullion, Eamon, Doyle, John Gerard, Shelyag, Sergiy and Gallagher, Peter T. (2015) Ellerman Bombs with jets: cause and effect. The Astrophysical Journal, 805 (1). p. 64. ISSN 1538-4357

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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 to study EB events on the solar disk and at the limb. Both data sets show that EBs are connected to the foot points of forming chromospheric jets. The limb observations show that a bright structure in the Hα blue wing connects to the EB initially fueling 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 Hα. In the disk data set, 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. 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 to 80 km s−1. MURaM simulations of quiet Sun reconnection show that micro-jets with properties similar to those of the observations follow the line of reconnection in the photosphere, with associated Hα brightening at the location of increased temperature.

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