Ellerman bombs—evidence for magnetic reconnection in the lower solar atmosphere

Nelson, CJ, Shelyag, Sergiy, Mathioudakis, M, Doyle, JG, Madjarska, MS, Uitenbroek, H and Erdélyi, R 2013, Ellerman bombs—evidence for magnetic reconnection in the lower solar atmosphere, Astrophysical journal, vol. 779, no. 2, pp. 1-10, doi: 10.1088/0004-637X/779/2/125.

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Title Ellerman bombs—evidence for magnetic reconnection in the lower solar atmosphere
Author(s) Nelson, CJ
Shelyag, SergiyORCID iD for Shelyag, Sergiy orcid.org/0000-0002-6436-9347
Mathioudakis, M
Doyle, JG
Madjarska, MS
Uitenbroek, H
Erdélyi, R
Journal name Astrophysical journal
Volume number 779
Issue number 2
Article ID 125
Start page 1
End page 10
Total pages 10
Publisher IOP Publishing
Place of publication Bristol, Eng.
Publication date 2013-12-20
ISSN 0004-637X
Keyword(s) Sun: atmosphere
Sun: chromosphere
Sun: magnetic fields
Sun: photosphere
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Summary The presence of photospheric magnetic reconnection has long been thought to give rise to short and impulsive events, such as Ellerman bombs (EBs) and Type II spicules. In this article, we combine high-resolution, high-cadence observations from the Interferometric BIdimensional Spectrometer and Rapid Oscillations in the Solar Atmosphere instruments at the Dunn Solar Telescope, National Solar Observatory, New Mexico, with co-aligned Solar Dynamics Observatory Atmospheric Imaging Assembly and Hinode Solar Optical Telescope (SOT) data to observe small-scale events situated within an active region. These data are then compared with state-of-the-art numerical simulations of the lower atmosphere made using the MURaM code. It is found that brightenings, in both the observations and the simulations, of the wings of the Hα line profile, interpreted as EBs, are often spatially correlated with increases in the intensity of the Fe I λ6302.5 line core. Bipolar regions inferred from Hinode/SOT magnetic field data show evidence of flux cancellation associated, co-spatially, with these EBs, suggesting that magnetic reconnection could be a driver of these high-energy events. Through the analysis of similar events in the simulated lower atmosphere, we are able to infer that line profiles analogous to the observations occur co-spatially with regions of strong opposite-polarity magnetic flux. These observed events and their simulated counterparts are interpreted as evidence of photospheric magnetic reconnection at scales observable using current observational instrumentation.
Language eng
DOI 10.1088/0004-637X/779/2/125
Field of Research 0201 Astronomical And Space Sciences
0305 Organic Chemistry
0306 Physical Chemistry (Incl. Structural)
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2013, The American Astronomical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30114952

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