New types of the chromospheric anemone microflares: Case studyстатья

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[1] Dumin Y. V., Somov B. V. New types of the chromospheric anemone microflares: Case study // arXiv [Solar and Stellar Astrophysics]. — Vol. 9439 of 1904. — Cornell University Library, 2019. The chromospheric anemone microflares (AMF) are an interesting kind of the transient solar phenomena where the emission regions have a multi-ribbon configuration, as distinct from the ordinary flares usually possessing only two ribbons. The previously reported AMFs had typically three or, less frequently, four ribbons; and it was shown in our recent Letter [Yu.V. Dumin & B.V. Somov, A&A, 623, L4 (2019)] that they can be reasonably described by the so-called GKSS model of magnetic field, involving four magnetic sources with various polarity and arrangement. An interesting question is if one can see more complex types of AMF (containing the grater number of the emission ribbons), which might be produced by more elaborated magnetic configurations? To answer this question, we performed a visual inspection of the large set of the emission patterns in the chromospheric line CaII H recorded by Hinode/SOT and confronted them with the respective magnetograms obtained by SDO/HMI. As follows from our analysis, it is really possible to identify the AMFs with much more complex spatial configurations as compared to the previously-known ones, e.g., involving five luminous ribbons with a nontrivial arrangement. They are produced by the effective magnetic sources (sunspots) of different polarity with intermittent arrangement in the cross-like configuration, but their number is greater than in the standard GKSS model.

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