Sunspot magnetic fields in solar cycle 24 on measurements at Crimea and Mount Wilson

Article Sidebar

PDF XML
Published: 22.03.2025
Metrics Information

Main Article Content

Zubeir Akhtemov
Crimean Astrophysical Observatory, Nauchny 298409
Yurii Tsap
Crimean Astrophysical Observatory, Nauchny 298409
Valentina Malaschuk
Crimean Astrophysical Observatory, Nauchny 298409

Abstract

We present a comparative analysis of 6235 measurements of maximum magnetic fields of the same sunspots obtained at the Crimean Astrophysical Observatory (CrAO) and the Mount Wilson Observatory (MWO) from 2009 to 2019, with the intensity B exceeding 1.5 kGs on CrAO data. It has been established that the average values of the magnetic fields derived at CrAO and MWO are 2053 and 1914 Gs, respectively. The correlation coefficient between the magnetic field measurements at different observatories is 0.63±0.01, and it decreases with increasing B. The difference between the average values of magnetic fields exceeds 500 Gs for sunspots with B ≥ 2.5 kGs. The maximum values of sunspot magnetic fields for the period under consideration according to CrAO and MWO data are 4.6 and 2.7 kGs, respectively. Possible reasons for data discrepancies are discussed.

Keywords: Sun, solar cycle, sunspot magnetic field measurements

Supporting Agencies

The work was partially supported by the Russian Science Foundation (No. 22-12-0030, Yu.T. Tsap) and the Ministry of Education and Science (research project No. 1021051101548-7-1.3.8, Z.S. Akhtemov).

Article Details

Issue

Vol. 6 No. 1 (2025)

Section

Magnetism and Activity of the Sun - 2023 Conference Proceedings

How to Cite

Akhtemov Z., Tsap Y., Malaschuk V., 2025. Acta Astrophysica Taurica, vol. 6, no. 1, pp. 19–23. Available at: https://astrophysicatauricum.org/index.php/aat/article/view/105 (Accessed: 31 March 2026)

The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License.

Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

Creative Commons License

References

Akhtemov Z.S., Tsap Yu.T., Malaschuk V.M., 2023. Geomagn. Aeronom., vol. 63, no. 8, pp. 1144–1148.

Hale G.E., Ellerman F., Nicholson S.B., Joy A.H., 1919. Astrophys. J., vol. 49, pp. 153–178.

Livingston W., Harvey J.W., Malanushenko O.V., Webster L., 2006. Solar Phys., vol. 239, pp. 41–68.

Lozitska N.I., Lozitsky V.G., Andryeyeva O.A., et al., 2015. Adv. Space Res., vol. 55, pp. 897–907.

Pevtsov A. et al., 2019. Astron. Astrophys., vol. 628, id. A103, pp. 1–14.

Severnyi A.B., Stepanov V.E., 1956. Izv. Krymsk. Astrofiz. Observ., vol. 16, pp. 3–11. (In Russ.)

Stepanov V.E., Petrova N.N., 1958. Izv. Krymsk. Astrofiz. Observ., vol. 18, pp. 66–95. (In Russ.)

Tsap Yu.T., Perebeynos V.A., Borisenko A.V., et al., 2019. Astron. Astrophys. Trans., vol. 31, iss. 3, pp. 363–368.