Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Estimation of the flux tube diameters outside sunspots using Hinode observations. Preliminary results
Репозиторій DSpace/Manakin
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Estimation of the flux tube diameters outside sunspots using Hinode observations. Preliminary results
Інший ID:
DOI:10.17721/2227-1481.6.20-23
Посилання:
Estimation of the flux tube diameters outside sunspots using Hinode observations. Preliminary results / O.O. Botygina, M.Yu. Gordovskyy, V.G. Lozitsky // Advances in Astronomy and Space Physics. — 2016. — Т. 6., вип. 1. — С. 20-23. — Бібліогр.: 17 назв. — англ.
Підтримка:
The authors are extremely thankful to Dr. Myroslav Stodilka for helpful discussions and anonymous referee for useful critical notes and comments. Hinode telescope is Japanese project which was constructed and launched by ISAS/JAXA, in cooperation with NAOJ (Japan), NASA (USA) and STFC (UK) Telescope is operated by named organizations
as well as ESA and NTS (Norway). This study was funded by the Taras Shevchenko National University of Kyiv, No.16BF023-01, No.16BF023-02 projects.
Дата:
2016
Переглядів:
717
Завантажень:
472
Анотація:
Indirect estimations of diameters of the smallest flux tubes outside sunspots are made using SOT/Hinode observations of Fei 6301.5 and 6302.5 lines. These estimations are based on the comparison of measured effective magnetic field strength Bₑff in named lines. It is shown that Bₑff (6301.5)/Bₑff (6302.5) ≈ 1.3 in the range Bₑff = 40-300 G, and Bₑff (6301.5)/Bₑff (6302.5) ≈ 1.0 for Bₑff ≤ 10-20 G. The first case corresponds to the two-component magnetic field with kG flux tubes and weak background field, whereas the second one corresponds to background field without flux tubes. Assuming that the field range Bₑff = 10-40 G corresponds to the case with only one flux tube in each pixel, the flux tube diameters should be 15-30 km. Possible influence of the brightness contrast and the Zeeman saturation could change this estimation by approximately 20%.
