Year: 2015
Type: article
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 H α 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 H α . 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 H α brightening at the location of increased temperature.
Source: The Astrophysical Journal
Authors: A. Reid, M. Mathioudakis, E. Scullion, J. G. Doyle, S. Shelyag, P. Gallagher
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: Astronomy Australia Limited, European Commission, Queen's University Belfast, Science Foundation Ireland, Swinburne University of Technology, Irish Research Council, Queen's University, Stockholms Universitet, Instituto de Astrofísica de Canarias, Science and Technology Facilities Council, Australian Research Council, National Cancer Institute
OpenAlex ID: W1655032334