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Magnetic field and radial velocity fluxes at the initial stages of the evolution of solar active regions based on measurements at the photospheric levelтезисы доклада
- Авторы: Садыков А.М., Красоткин С.А.
- Сборник: Dynamics of Solar and Stellar Convection Zones and Atmospheres, IAU Symposium 365
- Тезисы
- Год издания: 2023
- Место издания: Erevan, Armenia
- Первая страница: 56
- Последняя страница: 56
- Аннотация: As of today, there is no established consensus about the connection between the physical processes occurring in the convection zone and photosphere of the Sun and the associated solar activity. One of the common ideas about the origin and evolution of active regions (AR) is the hypothesis about the emerging magnetic flux tubes. To test this hypothesis, it is necessary to study the dynamics of changes in the magnetic fields and radial velocities in the AR at its initial stages of evolution. If the hypothesis of the emerging magnetic flux tubes is correct, both phenomena should be interrelated: with an increase in the magnetic flux, the upflows detected in the radial velocities should increase. In this work, we perform a systematic study of the behavior of the magnetic fields and the radial velocities at the initial stages of evolution of ARs. We utilize the observations of the line-of-sight magnetic field made by the GONG (Global Oscillation Network Group) network of ground-based telescopes and select 30 emerging ARs suitable for our analysis. We filter the magnetogram region corresponding to the significantly large magnetic fluxes. Contrary to the expected increase of the upflow signal by the emerging flux hypothesis, we observe the decrease of the upflows and the intensification of the downflows at the emerging stages of ARs. Therefore, our analysis indicate potential inconsistencies between the hypothesis of the emerging magnetic flux tubes and the observed behavior of the ARs at their initial stages of evolution.
- Добавил в систему: Садыков Айдар Маратович