A new trigger mechanism for coronal mass ejections. The role of confined flares and photospheric motions in the formation of hot flux ropes

James, A. W., L. M. Green, L. van Driel-Gesztelyi, and G. Valori, A new trigger mechanism for coronal mass ejections. The role of confined flares and photospheric motions in the formation of hot flux ropes, A&A, 644, A137 (2020) (ADS)

The cartoon

(click on the image for a larger version)

An elementary description of the "orbiting" motion of satellite spots, argued in this paper to intensify the coronal field gradients and thereby to favor breakout reconnection. The orbiting results from some combination of flows and magnetic emergence, and the paper finds support from the homology of successive events. Both persistent horizontal flows, and persistent (large-scale) flux emergence could lead to homologous flares.

Date: 2021 January 31