Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 12815 10.12737/20995 Results of current research Results of current research Results of current research Corona during the total solar eclipse on March 20, 2015, and 24 cycle development Corona during the total solar eclipse on March 20, 2015, and 24 cycle development Язев Сергей Арктурович Yazev Sergey Arkturovich syazev@gmail.com

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Мордвинов Александр Вениаминович Mordvinov Aleksandr Veniaminovich avm@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Дворкина-Самарская Антонина Анатольевна Dvorkina-Samarskaya Antonina Anatolyevna dsantonina@gmail.com Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Иркутский государственный университет Иркутск Россия Irkutsk State University Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Иркутский государственный университет Иркутск Россия Irkutsk State University Irkutsk Russian Federation 08 08 2016 08 08 2016 2 2 3 14 https://zh-szf.ru/en/nauka/article/12815/view

We analyzed the structure of coronal features, using data on the March 20, 2015 total solar eclipse. The Ludendorff index characterizing the flattening of the corona is 0.09. The solar corona structure in the Northern and Southern hemispheres corresponds to the maximum and post-maximum phases of solar activity, respectively. The asynchronous development of magnetic activity in the Sun’s Northern and Southern hemispheres caused a substantial asymmetry of coronal features observed at the reversal of polar magnetic fields in the current cycle. The polar ray structures in the Southern Hemisphere are associated with the polar coronal hole, while in the Northern Hemisphere a polar hole has not been formed yet. We examine the relation between large-scale magnetic fields and location of high coronal structures.

We analyzed the structure of coronal features, using data on the March 20, 2015 total solar eclipse. The Ludendorff index characterizing the flattening of the corona is 0.09. The solar corona structure in the Northern and Southern hemispheres corresponds to the maximum and post-maximum phases of solar activity, respectively. The asynchronous development of magnetic activity in the Sun’s Northern and Southern hemispheres caused a substantial asymmetry of coronal features observed at the reversal of polar magnetic fields in the current cycle. The polar ray structures in the Southern Hemisphere are associated with the polar coronal hole, while in the Northern Hemisphere a polar hole has not been formed yet. We examine the relation between large-scale magnetic fields and location of high coronal structures.

 Total solar eclipse asymmetry solar corona Total solar eclipse asymmetry solar corona

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