Measurements of strong magnetic fields in umbra of sunspots: Crimea vs Mt. Wilson

Autor:	Tsap, Yu. T., Perebeynos, V. A., Borisenko, A. V., Lozitska, N. I., Shtertser, N. I., Motorina, G. G., Kuleshova, A. I.
Rok vydání:	2020
Předmět:	Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
Popis:	The comparative analysis for 1324 measurements of the corresponding sunspot magnetic fields with B > 2.5 kG (according to Crimean data) obtained at Crimean and Mt. Wilson observatories from 2010 to 2017 has been carried out. It has been shown that the difference between measurements can exceed 1 kG in some cases. The averaged values of the magnetic field are equal to 2759 G (Crimea) and 2196 G (Mt. Wilson). The maximum sunspot magnetic field measured at Mt. Wilson does not reach 2.7 kG while according to Crimean data it can exceed 4.0 kG. The correlation coefficient between measurements of magnetic fields in different observatories does not exceed 0.22. The probable reasons of significant discrepancies are discussed. Comment: 5 pages, 3 figures, Astronomical and Astrophysical Transactions (AApTr), accepted
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2003.12889 Zobrazit plný text záznamu View this record from Arxiv