A catalog of active regions of the 24th solar cycle

  • Анастасия Владимировна Жукова Crimean Astrophysical Observatory, Nauchny, 298409

Abstract

Data set acquired by HMI/SDO allowed us to calculate a magnetic flux from active regions on the visible surface of the Sun during 2010-2017. We classified ARs into three categories: A-type - regular bipolar ARs; U-type - unipolar spots; B-type - irregular ARs, violating mean-field dynamo rules (either Hale’s polarity law or Joy’s law or having the leading spot less than the main following spot). The B-type ARs, in turn, were segregated into three relevant subcategories. In total, 1684 ARs with the unsigned magnetic flux above 1020 Мх were detected. A catalog of ARs was compiled, which contains the total (unsigned) magnetic flux of an AR, its category, and other data.
The catalog can be used to study changes of the magnetic flux from the categories of ARs with cycle.
It also might be used as a base for investigations of the connection between the global mean-field and
the turbulent small-scale dynamos.

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Published
2018-07-03
How to Cite
Жукова А.В., 2018. Izvestiya Krymskoi Astrofizicheskoi Observatorii, vol. 114, no. 2, pp. 74-86. DOI: 10.31059/izcrao-vol114-iss2-pp74-86
Section
Research articles