International Conference of Physicists.SPb, October 20-24, 2025, Saint Petersburg
Astronomy and Astrophysics

Analysis of the subsecond structure of X-ray and radio bursts in solar flares

A. N. Shabalin, Yu. E. Charikov, E. M. Sklyarova

Ioffe Institute, St. Petersburg

Abstract: Studying subsecond X-ray and radio bursts (spikes) in solar flares provides insights into the temporal characteristics of magnetic reconnection and particle acceleration in the solar atmosphere. These rapid flux variations reveal the characteristic timescales of energy release processes in flares. Here, we analyzed an M2.8 flare that occurred on January 12, 2000, during which both X-ray and radio bursts were recorded. We detected bursts using an improved empirical mode decomposition technique that offers high sensitivity and a low false-positive rate. Analysis of the flare’s temporal structure revealed delays between bursts in different energy bands and allowed us to estimate the plasma parameters in the emission region.

Keywords: solar flares, hard X-ray (HXR) emission, radio emission, sub-second bursts, particle acceleration, magnetic reconnection.

Received: 04.05.2025
Revised: 13.08.2025
Accepted: 15.08.2025

DOI: 10.61011/JTF.2025.12.61790.234-25

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