Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25

Григорьев Виктор Михайлович; Ермакова Людмила Викторовна; Хлыстова Анна Иннокентьевна

doi:10.12737/stp-84202202

УДК 523.9

APPEARANCE OF ACTIVE REGIONS AT THE END OF SOLAR CYCLE 24 AND AT THE BEGINNING OF CYCLE 25 Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25

АА Аа

Опубликовано в Solar-Terrestrial Physics · Том 8, Номер 4 · Страницы 28–35 · Рубрика: Results of current research

DOI: https://doi.org/10.12737/stp-84202202

Получено: 18.05.2022 Одобрено: 15.09.2022 Опубликовано: 24.12.2022 Язык публикаций: ENG

Авторы

ГР

Григорьев Виктор Михайлович

ЕР

Ермакова Людмила Викторовна

ХЛ

Хлыстова Анна Иннокентьевна

ГР

Григорьев Виктор Михайлович

Ученая степень: доктор физико-математических наук

Ученое звание: член-корреспондент author.academy_titles.32

Институт солнечно-земной физики СО РАН Россия · Иркутск

ЕР

Ермакова Людмила Викторовна

Ученая степень: кандидат физико-математических наук

Институт солнечно-земной физики СО РАН Россия · Иркутск

ХЛ

Хлыстова Анна Иннокентьевна

Ученая степень: кандидат физико-математических наук

Институт солнечно-земной физики СО РАН Россия · Иркутск

АННОТАЦИЯ

The spatial-temporal picture of appearance of active regions and the relationship of their appearance with the structure and development of a large-scale magnetic field were studied during the transition from solar cycle 24 to 25. During this period, solar activity is low, and therefore the dynamics of a large-scale magnetic field in the appearance of new active regions is most noticeable. We have used SDO/HMI data on the longitudinal magnetic field to determine the time and heliographic coordinates of the origin of an active region, as well as daily WSO maps (Wilcox Solar Observatory) to compare with the structure of the large-scale magnetic field. We have obtained the following results. During the transition from one cycle to another, new active regions appeared in half of the cases in the polarity inversion line of the large-scale magnetic field, and almost exclusively at the Hale boundaries in the corresponding hemispheres and solar cycles. In other cases, the places of appearance were unipolar regions of the large-scale magnetic field without a clear advantage in the location of the field regions according to the Hale law. The formation of active regions is preceded or accompanied by changes in the structure of the large-scale magnetic field. At the same time, in the fine structure of the magnetic field in the photosphere we can observe an increase in the magnetic field network on a spatial scale of the size of supergranules and larger, as well as the appearance of small regions of a new magnetic field of both polarities. The appearing active regions were concentrated in two narrow longitudinal zones that covered both hemispheres of the Sun. The new cycle began in the same longitudinal zones, where the activity of the old cycle decayed.

КЛЮЧЕВЫЕ СЛОВА

magnetic field, active regions

Финансирование

The work was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Grant No. 075-GZ/Ts3569/278)

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Главный редактор

Жеребцов Гелий Александрович

solater@iszf.irk.ru

Заместитель главного редактора

Степанов Александр Владимирович

stepanov@gaoran.ru

Заместитель главного редактора

Потапов Александр Сергеевич

potapov@iszf.irk.ru

Ответственный секретарь редакции

Полюшкина Наталья Александровна

npol@iszf.irk.ru

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ГОСТ

Григорьев В. М., Ермакова Л. В., Хлыстова А. И. Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25 // Solar-Terrestrial Physics. 2022. №. 4. С. 28-35. DOI: https://doi.org/10.12737/stp-84202202. (дата обращения: 29.09.2026).

MLA

Григорьев Виктор Михайлович, Ермакова Л. В., Хлыстова А. И.. "Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25." Solar-Terrestrial Physics 8.4 (2022): 28-35. DOI: https://doi.org/10.12737/stp-84202202.

APA

Григорьев В. М., Ермакова Л. В., Хлыстова А. И. (2022). Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25. Solar-Terrestrial Physics, 8(4), 28-35. https://doi.org/10.12737/stp-84202202

Chicago

Григорьев Виктор Михайлович, Ермакова Л. В., Хлыстова А. И.. "Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25." Solar-Terrestrial Physics 8, no. 4 (2022): 28-35. https://doi.org/10.12737/stp-84202202.

WIKI

{{cite journal | author = Григорьев В. М., Ермакова Л. В., Хлыстова А. И. | title = Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25 | journal = Solar-Terrestrial Physics | year = 2022 | volume = 8 | issue = 4 | pages = 28-35 | doi = 10.12737/stp-84202202 }}

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APPEARANCE OF ACTIVE REGIONS AT THE END OF SOLAR CYCLE 24 AND AT THE BEGINNING OF CYCLE 25 Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25

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