Details

Autor(en) / Beteiligte

• Young, Peter R.
• Tian, Hui
• Peter, Hardi
• Rutten, Robert J.
• Nelson, Chris J.
• Huang, Zhenghua
• Schmieder, Brigitte
• Vissers, Gregal J. M.
• Toriumi, Shin
• van der Voort, Luc H. M. Rouppe
• Madjarska, Maria S.
• Danilovic, Sanja
• Berlicki, Arkadiusz
• Chitta, L. P.
• Cheung, Mark C. M.
• Madsen, Chad
• Reardon, Kevin P.
• Katsukawa, Yukio
• Heinzel, Petr

Titel

Solar Ultraviolet Bursts

Ist Teil von

• Space science reviews, 2018-12, Vol.214 (8), p.1-39, Article 120

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The term “ultraviolet (UV) burst” is introduced to describe small, intense, transient brightenings in ultraviolet images of solar active regions. We inventorize their properties and provide a definition based on image sequences in transition-region lines. Coronal signatures are rare, and most bursts are associated with small-scale, canceling opposite-polarity fields in the photosphere that occur in emerging flux regions, moving magnetic features in sunspot moats, and sunspot light bridges. We also compare UV bursts with similar transition-region phenomena found previously in solar ultraviolet spectrometry and with similar phenomena at optical wavelengths, in particular Ellerman bombs. Akin to the latter, UV bursts are probably small-scale magnetic reconnection events occurring in the low atmosphere, at photospheric and/or chromospheric heights. Their intense emission in lines with optically thin formation gives unique diagnostic opportunities for studying the physics of magnetic reconnection in the low solar atmosphere. This paper is a review report from an International Space Science Institute team that met in 2016–2017.