http://arxiv.org/abs/2209.04755
The angular distance of the solar flares from their position to the projection point of the center of the Sun on the solar disk has been studied during the periods 1975${-}$2021 for GOES events and 2002${-}$2021 for RHESSI events. This distribution by the number of events of flare importance gives a specific curvature shape, that remains the same without significant changes, with the different GOES classifications, and with different observational satellites. during each solar cycle. The curvature of the distance distribution has four peaks, which are denoted by the four central rings around the center of the solar disk that look like the solar inner layers in the background. 1) The core circle [0 ${-}$ 15$^{\circ}$]: it is a projection of the solar core onto the solar disk. 2) Radiative ring [15$^{\circ}$ ${-}$ 45$^{\circ}$]. 3) The convection ring [45$^{\circ}$ ${-}$ 55$^{\circ}$ ]. The limb ring [80$^{\circ}$ ${-}$ 90$^{\circ}$]. A large number of solar flares occurred in the radiative and convection rings. While we have a few events in the core and limb rings.
R. Mawad
Tue, 13 Sep 22
65/85
Comments: 9 pages, 6 figure, 10 plots of figures
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