PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Solar & Heliospheric Physics (SH)
Searching for sub-populations within the gamma-ray solar flares catalog: a graph-based clustering analysis
J. Mauro* and G. de Wasseige
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Pre-published on: July 25, 2023
Published on:
Solar flares are highly energetic events that happen in the solar atmosphere. They are mostly
observed as X-ray or gamma-ray bursts located on the Sun’s surface. While they are known to
be sites of particle acceleration, the acceleration process(es) responsible for the observed fluxes
remain unsure. The diversity in shape and duration of the 𝛾-ray fluxes suggests the existence
of distinct phases of hadronic acceleration. Moreover, different acceleration processes could
explain the differences observed among flares. In this work we search for the evidence of subpopulations within the catalogue of gamma-ray solar flares observed by Fermi-LAT. We aim at
grouping flares with similar physical properties to be able to probe theoretical models for neutrino
production within different classes of flares. We use measurements of the X-ray and 𝛾-ray fluxes,
as well as CMEs and SEPs, to cluster the events using a graph-based algorithm. Furthermore,
we investigate the most representative features that characterise the identified sub-populations to
allow for qualitative analysis and model development.
DOI: https://doi.org/10.22323/1.444.1292
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