Solar Ultraviolet Bursts |
| |
| Authors: | Peter R Young Hui Tian Hardi Peter Robert J Rutten Chris J Nelson Zhenghua Huang Brigitte Schmieder Gregal J M Vissers Shin Toriumi Luc H M Rouppe van der Voort Maria S Madjarska Sanja Danilovic Arkadiusz Berlicki L P Chitta Mark C M Cheung Chad Madsen Kevin P Reardon Yukio Katsukawa Petr Heinzel |
| |
| Institution: | 1.College of Science,George Mason University,Fairfax,USA;2.NASA Goddard Space Flight Center,Greenbelt,USA;3.Northumbria University,Newcastle Upon Tyne,UK;4.School of Earth and Space Sciences,Peking University,Beijing,China;5.Max Planck Institute for Solar System Research,G?ttingen,Germany;6.Lingezicht Astrophysics,Deil,The Netherlands;7.Institute of Theoretical Astrophysics,University of Oslo,Oslo,Norway;8.School of Mathematics and Statistics,University of Sheffield,Sheffield,UK;9.Astrophysics Research Centre, School of Mathematics and Physics,Queen’s University,Belfast,UK;10.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences,Shandong University,Weihai,China;11.LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06,Univ. Paris Diderot, Sorbonne Paris Cité,Meudon,France;12.Institute for Solar Physics, Department of Astronomy, AlbaNova University Centre,Stockholm University,Stockholm,Sweden;13.National Astronomical Observatory of Japan,Tokyo,Japan;14.Astronomical Institute,University of Wroc?aw,Wroc?aw,Poland;15.Rosseland Centre for Solar Physics,Oslo,Norway;16.Astronomical Institute,Academy of Sciences of the Czech Republic,Ondrejov,Czech Republic;17.Lockheed Martin Solar and Astrophysics Lab,Palo Alto,USA;18.Harvard-Smithsonian Center for Astrophysics,Cambridge,USA;19.Center for Space Physics,Boston University,Boston,USA;20.2 National Solar Observatory,Boulder,USA;21.INAF-Osservatorio Astrofisico di Arcetri,Firenze,Italy |
| |
| Abstract: | 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. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
