Email this article Long-period variations in the magnetic field of small-scale solar structures
- Authors: Strekalova P.V.1,2, Nagovitsyn Y.A.1,3, Riehokainen A.4, Smirnova V.V.1
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Affiliations:
- Main Astronomical (Pulkovo) Observatory
- St. Petersburg State University
- St. Petersburg State University of Aerospace Instrumentation
- University of Turku
- Issue: Vol 56, No 8 (2016)
- Pages: 1052-1059
- Section: Article
- URL: https://journals.rcsi.science/0016-7932/article/view/156022
- DOI: https://doi.org/10.1134/S0016793216080211
- ID: 156022
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Abstract
Thirty small-scale structures in the solar atmosphere, i.e., facula nodes at ±(20°–46°) latitudes, have been studied in order to analyze quasi-periodic variations in the magnetic field. SDO/HMI magnetograms have been used for this purpose. Long-period variations in the magnetic field strength of the considered objects in the 60–280 min range have been revealed as a result of data processing. It has been shown that there are no dependences between the magnetic field and period, nor between the magnetic field and object area. It has been assumed that the discovered variations are not natural oscillations of the magnetic field strength.
About the authors
P. V. Strekalova
Main Astronomical (Pulkovo) Observatory; St. Petersburg State University
Author for correspondence.
Email: auriga-lynx@yandex.ru
Russian Federation, St. Petersburg, 196140; St. Petersburg, 199034
Yu. A. Nagovitsyn
Main Astronomical (Pulkovo) Observatory; St. Petersburg State University of Aerospace Instrumentation
Email: auriga-lynx@yandex.ru
Russian Federation, St. Petersburg, 196140; St. Petersburg
A. Riehokainen
University of Turku
Email: auriga-lynx@yandex.ru
Finland, Turku
V. V. Smirnova
Main Astronomical (Pulkovo) Observatory
Email: auriga-lynx@yandex.ru
Russian Federation, St. Petersburg, 196140
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