Active longitudes and the structure of the large-scale magnetic field at solar minimum

Григорьев Виктор Михайлович; Ермакова Людмила Викторовна

doi:10.12737/stp-94202303

УДК 52

ACTIVE LONGITUDES AND THE STRUCTURE OF THE LARGE-SCALE MAGNETIC FIELD AT SOLAR MINIMUM Active longitudes and the structure of the large-scale magnetic field at solar minimum

АА Аа

Опубликовано в Solar-Terrestrial Physics · Том 9, Номер 4 · Страницы 25–31 · Рубрика: Results of current research

DOI: https://doi.org/10.12737/stp-94202303

Получено: 29.06.2023 Одобрено: 12.09.2023 Опубликовано: 28.12.2023 Язык публикаций: ENG

Авторы

ГР

Григорьев Виктор Михайлович

ЕР

Ермакова Людмила Викторовна

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

АННОТАЦИЯ

We have studied deep minima of 11-year solar activity cycles 13–14, 14–15, 22–23, 23–24, 24–25, using the RGO and USAF/NOAA sunspot group catalogs. All of them have a large number of spotless days. Nonetheless, active longitudes as preferred zones, where sunspots occur, appear at this solar cycle phase. Analysis of synoptic maps and WSO daily magnetograms reflecting the structure of a weak large-scale field shows a non-axisymmetric component of the solar magnetic field. At solar minimum in the structure of the large-scale magnetic field, there are regions of the magnetic field of positive and negative polarity elongated along the meridian and crossing the equator. The most pronounced of them are located in the zone of active longitudes and are often connected with the polar magnetic fields. We discuss the possible nature of the meridional structures of the large-scale field during solar minimum. This might be due to giant convection cells with a banana cell structure.

КЛЮЧЕВЫЕ СЛОВА

large-scale magnetic field, active regions

Финансирование

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

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ГОСТ

Григорьев В. М., Ермакова Л. В. Active longitudes and the structure of the large-scale magnetic field at solar minimum // Solar-Terrestrial Physics. 2023. №. 4. С. 25-31. DOI: https://doi.org/10.12737/stp-94202303. (дата обращения: 24.09.2026).

MLA

Григорьев Виктор Михайлович, Ермакова Л. В.. "Active longitudes and the structure of the large-scale magnetic field at solar minimum." Solar-Terrestrial Physics 9.4 (2023): 25-31. DOI: https://doi.org/10.12737/stp-94202303.

APA

Григорьев В. М., Ермакова Л. В. (2023). Active longitudes and the structure of the large-scale magnetic field at solar minimum. Solar-Terrestrial Physics, 9(4), 25-31. https://doi.org/10.12737/stp-94202303

Chicago

Григорьев Виктор Михайлович, Ермакова Л. В.. "Active longitudes and the structure of the large-scale magnetic field at solar minimum." Solar-Terrestrial Physics 9, no. 4 (2023): 25-31. https://doi.org/10.12737/stp-94202303.

WIKI

{{cite journal | author = Григорьев В. М., Ермакова Л. В. | title = Active longitudes and the structure of the large-scale magnetic field at solar minimum | journal = Solar-Terrestrial Physics | year = 2023 | volume = 9 | issue = 4 | pages = 25-31 | doi = 10.12737/stp-94202303 }}

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ACTIVE LONGITUDES AND THE STRUCTURE OF THE LARGE-SCALE MAGNETIC FIELD AT SOLAR MINIMUM Active longitudes and the structure of the large-scale magnetic field at solar minimum

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