Solar-Terrestrial Physics Solar-Terrestrial Physics Солнечно-земная физика / Solnechno-Zemnaya Fizika / Solar-Terrestrial Physics 2712-9640 80892 10.12737/szf-103202402 ДЕВЯТНАДЦАТАЯ ЕЖЕГОДНАЯ КОНФЕРЕНЦИЯ «ФИЗИКА ПЛАЗМЫ В СОЛНЕЧНОЙ СИСТЕМЕ», 5–9 ФЕВРАЛЯ 2024 Г., ИНСТИТУТ КОСМИЧЕСКИХ ИССЛЕДОВАНИЙ РАН, МОСКВА, РОССИЯ 19TH ANNUAL CONFERENCE “PLASMA PHYSICS IN THE SOLAR SYSTEM”. FEBRUARY 5–9, 2024, SPACE RESEARCH INSTITUTE RAS, MOSCOW, RUSSIA ДЕВЯТНАДЦАТАЯ ЕЖЕГОДНАЯ КОНФЕРЕНЦИЯ «ФИЗИКА ПЛАЗМЫ В СОЛНЕЧНОЙ СИСТЕМЕ», 5–9 ФЕВРАЛЯ 2024 Г., ИНСТИТУТ КОСМИЧЕСКИХ ИССЛЕДОВАНИЙ РАН, МОСКВА, РОССИЯ Heating manifestations at the onset of the 29 June 2012 flare Проявления нагрева в начале вспышки 29 июня 2012 г. https://orcid.org/0000-0002-6873-6394 Мешалкина Наталия Сергеевна Meshalkina Nataliya Sergeevna nata@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0002-1589-556X Алтынцев Александр Тимофеевич Altyntsev Alexander Timofeevich

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation 29 09 2024 29 09 2024 10 3 13 20 26 03 2024 03 05 2024 https://naukaru.ru/en/nauka/article/80892/view

Анализ данных GOES для вспышки SOL2012-06-29T04:09 класса C4.6 показывает тепловой характер энерговыделения в течение нескольких минут перед импульсной стадией. Нагрев плазмы до температур выше 10 MК приводит к появлению струй плазмы вдоль открытых силовых линий и в больших петлях. В работе исследуется взаимосвязь нагретой плазмы со вспышечной структурой и ее динамикой по данным наблюдений в рентгеновском, крайнем ультрафиолетовом и радиоволновом диапазонах. Особое внимание привлекает обнаружение на динамических спектрах тонких временных структур узкополосного радиоизлучения до и после импульсной стадии вспышки. На начальной стадии наблюдаются широкополосные импульсы в дециметровом диапазоне, которые можно связать с формированием тепловых фронтов в струях. Серия сверхъярких всплесков в сантиметровом диапазоне, характеризующихся частотным дрейфом, наблюдается после окончания импульсного энерговыделения в ядре вспышки. По данным Сибирского солнечного радиотелескопа (5.7 ГГц) было установлено, что источники этих субсекундных всплесков находятся в удаленном основании крупномасштабной вспышечной петли.

Analysis of GOES data for the SOL2012-06-29T04:09 flare, class C4.6, shows a thermal character of the energy release for several minutes before the impulsive stage. Plasma heating to temperatures above 10 MK leads to the appearance of plasma jets along open field lines and in large loops. This work examines the relationship between the heated plasma and the flare structure and its dynamics, using observations in the X-ray, extreme ultraviolet (EUV), and radio-wave ranges. Particular attention is drawn to the detection of narrow-band fine temporal structures of radio emission before and after the impulsive stage of the flare in dynamic spectra. In the initial stage, broadband pulses in the decimeter range are observed which can be associated with the formation of thermal fronts in the jets. A series of super-bright drifting bursts in the centimeter range occurs after the end of the impulsive energy release in the flare kernel. Using data from the Siberian Solar Radio Telescope (5.7 GHz), we managed to localize the position of the source of the fine structure of drifting bursts at the remote footpoint of the large-scale flare loop.

 Солнце тонкая временная структура механизмы нагрева микроволновые всплески когерентное излучение тепловой фронт эффект Ньюперта Sun fine temporal structure heating mechanisms microwave bursts coherent emission thermal front Neupert effect Исследование выполнено при финансовой поддержке гранта РНФ № 22-12-00308. Раздел об анализе данных ССРТ и тонкой структуре (Н.С.М.) выполнен при финансовой поддержке Минобрнауки России в рамках базового финансирования программы II.16.3.2 «Нестационарные и волновые процессы в солнечной атмосфере» The study was financially supported by RSF grant No. 22-12-00308. The section on the analysis of SSRT data and the fine structure (N.S.M.) was financially supported by the Ministry of Science and Higher Education of the Russian Federation with budgetary funding from Basic Research Program II.16.3.2 “Nonstationary and Wave Processes in the Solar Atmosphere”

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