INTEGRAL data help uncover the relationships between the magnetic reconnection and high-energy particles on the Sun
A paper by Kurt, Veronig, Fleishman et al. (2024) analyzed multi-messenger data,
including INTEGRAL hard X-ray emission, on one of the ever-strongest solar flares
that occurred on 2003-Oct-28. The study proves that the main energy release and
proton acceleration up to subrelativistic energies began just when the reconnection
rate was going through the maximum i.e., after a major change of the flare topology.
The figure displays observables of the 2003 October 28 flare. (a) Reconnection
flux derived in the positive (blue) and negative (red) domains (left Y-axis) and
the GOES 1—8 Å soft X-ray flux (black curve, right Y-axis). (b) Reconnection
rates — positive (blue) and negative (red). (c) Soft X-ray flux derivative,
Konus-Wind count rate at 16—69 keV (blue) and CORONAS-F/SPRN rate at 15—40 keV (red).
(d) Konus-Wind rate at 69--285 keV (blue) and CORONAS-F/SPRN rate at 40—100 keV (red).
(e) 15.4 GHz microwave emission flux (black). (f) INTEGRAL/SPI flux above 150 keV and
Konus-Wind rate at 285—1128 keV (blue). The early rise phase onset time
T0=10:58:30 UT and the main rise phase onset time T1=11:01:16 UT
are marked with black vertical lines. The red vertical line indicates the onset of
the main energy release phase, T2=11:03:40 UT, that ended at about
T3=11:10 UT. The INTEGRAL data show an excellent consistency with other data,
particularly, with the Konus-Wind data, which, taken together helped uncover the
relationships between the magnetic reconnection and high-energy particles on the Sun.
References:
"Coupling between magnetic reconnection, energy release, and particle acceleration in the X17.2 2003 October 28 solar flare",
Kurt, V., Veronig, A., Fleishman, G., Hinterreiter, J., Tschernitz, J., Lysenko, A.,
A&A 686, A195 (2024),
https://ui.adsabs.harvard.edu/abs/2024A%26A...686A.195K
