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New Types of the Chromospheric Anemone Microflares: Case Study
Solar Physics ( IF 2.8 ) Pub Date : 2020-07-01 , DOI: 10.1007/s11207-020-01662-8
Yurii V. Dumin , Boris V. Somov

Chromospheric anemone microflares (AMFs) are transient solar phenomena whose emission regions have a multi-ribbon configuration. As distinct from the so-called “atypical” solar flares, also possessing a few ribbons, the temporal and spatial scales of AMFs are a few times less, and the configuration of their ribbons is more specific (star-like). The previously reported AMFs had typically three or, less frequently, four ribbons; and it was shown in our recent paper (Dumin and Somov in Astron. Astrophys. 623 , L4, 2019 ) that they can be reasonably described by the so-called GKSS model of magnetic field, involving as few as four point-like magnetic sources with various polarity and arrangement. To seek for the new types of AMFs, we performed inspection of the large set of the emission patterns in the chromospheric line Ca II H recorded by Hinode /SOT and confronted them with the respective magnetograms obtained by SDO/HMI. As follows from this analysis, it is really possible to identify the new unusual AMFs. Firstly, these are the flares occurring in the regions with unbalanced magnetic flux. Secondly, and most interesting, it is possible to identify the AMFs with much more complex spatial configurations, e.g. , involving five luminous ribbons with a non-trivial arrangement. As follows from the corresponding magnetograms, they are produced by the effective magnetic sources (sunspots) of different polarity with intermittent arrangement, but their number is greater than in the standard GKSS model.

中文翻译:

新型色球海葵微耀斑:案例研究

色球海葵微耀斑 (AMF) 是瞬态太阳现象,其发射区域具有多条带配置。与所谓的“非典型”太阳耀斑不同,也有一些带状,AMF的时空尺度小几倍,带状结构更具体(星状)。先前报道的 AMF 通常具有三个或更少频率的四个色带;我们最近的论文 (Dumin 和 Somov in Astron. Astrophys. 623 , L4, 2019 ) 表明,它们可以通过所谓的 GKSS 磁场模型合理地描述,涉及少至四个点状磁源具有各种极性和排列。寻找新型 AMF,我们对 Hinode /SOT 记录的色球线 Ca II H 中的大量发射模式进行了检查,并将它们与 SDO/HMI 获得的相应磁力图进行了对比。从这个分析中可以看出,确实有可能识别出新的异常 AMF。首先,这些是发生在磁通量不平衡区域的耀斑。其次,也是最有趣的是,可以识别具有更复杂空间配置的 AMF,例如,涉及具有非平凡布置的五个发光带。从对应的磁图可以看出,它们是由不同极性的有效磁源(太阳黑子)产生的,间歇排列,但它们的数量比标准GKSS模型中的要多。从这个分析中可以看出,确实有可能识别出新的异常 AMF。首先,这些是发生在磁通量不平衡区域的耀斑。其次,也是最有趣的是,可以识别具有更复杂空间配置的 AMF,例如,涉及具有非平凡布置的五个发光带。从对应的磁图可以看出,它们是由不同极性的有效磁源(太阳黑子)产生的,间歇排列,但它们的数量比标准GKSS模型中的要多。从这个分析中可以看出,确实有可能识别出新的异常 AMF。首先,这些是发生在磁通量不平衡区域的耀斑。其次,也是最有趣的是,可以识别具有更复杂空间配置的 AMF,例如,涉及具有非平凡布置的五个发光带。从对应的磁图可以看出,它们是由不同极性的有效磁源(太阳黑子)产生的,间歇排列,但它们的数量比标准GKSS模型中的要多。可以识别具有更复杂空间配置的 AMF,例如,涉及具有非平凡布置的五个发光带。从对应的磁图可以看出,它们是由不同极性的有效磁源(太阳黑子)产生的,间歇排列,但它们的数量比标准GKSS模型中的要多。可以识别具有更复杂空间配置的 AMF,例如,涉及具有非平凡布置的五个发光带。从对应的磁图可以看出,它们是由不同极性的有效磁源(太阳黑子)产生的,间歇排列,但它们的数量比标准GKSS模型中的要多。
更新日期:2020-07-01
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