УДК 53 Физика
УДК 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа
УДК 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии
УДК 523 Солнечная система
УДК 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система
УДК 52-1 Метод изучения
УДК 52-6 Излучение и связанные с ним процессы
ГРНТИ 41.00 АСТРОНОМИЯ
ГРНТИ 29.35 Радиофизика. Физические основы электроники
ГРНТИ 29.31 Оптика
ГРНТИ 29.33 Лазерная физика
ГРНТИ 29.27 Физика плазмы
ГРНТИ 29.05 Физика элементарных частиц. Теория полей. Физика высоких энергий
ОКСО 03.06.01 Физика и астрономия
ОКСО 03.05.01 Астрономия
ОКСО 03.04.03 Радиофизика
ББК 2 ЕСТЕСТВЕННЫЕ НАУКИ
ББК 223 Физика
ТБК 614 Астрономия
ТБК 6135 Оптика
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
An acute problem in the study of the solar chromosphere is the following obvious contradiction between the results of radio astronomical measurements of the height (extension) of the chromosphere and model calculations made on the basis of classical standard atmospheric models: the height of the chromosphere according to radio data is significantly greater than the model calculations. This is largely due to the fact that the widely used models are based on UV observations and, in addition, are one-dimensional and do not take into account the strong structural inhomogeneity of the chromosphere. Numerous attempts to ``improve'' the models by introducing various elements of inhomogeneity and ``fit'' them to radio data are purely empirical and are not substantiated theoretically. In such a situation, it is important to obtain more accurate and reliable radio observation data. This is all the more important because such data can serve as a basis for testing the recently developed 3D inhomogeneous theoretical models of the solar atmosphere. The article presents new data obtained from observations of a partial solar eclipse on June 10, 2021, using the RT-22 radio telescope of the Lebedev Physical Institute at a wavelength of 1.4 cm: the estimate of the radio radius is not more than 13''. The contradictions mentioned above remain significant.
Sun: chromosphere, radio radiation, solar eclipse
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