First direct detection of a stellar energetic particle event
Authors/Creators
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1.
Netherlands Institute for Radio Astronomy
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2.
University of Amsterdam
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3.
Observatoire de Paris
- 4. University of Vienna
Description
Energetic particle events occur when charged particles are accelerated to near-relativistic energies during stellar flares or coronal mass ejections, and they help shape planetary atmospheres through erosion and chemistry. Traditional stellar activity probes, such as optical and soft X-ray flares, trace thermal plasma and are effectively blind to escaping relativistic particle beams. Based on solar studies, we know that a characteristic radio burst (called a Type III burst) provides an unambiguous signature of energetic electrons propagating along open magnetic field lines. However, there has not been a detection of an extrasolar Type III burst. In this poster, I present the first extrasolar analogue of a solar Type III burst, which signals the presence of escaping energetic particles. This detection demonstrates that stellar energetic particle events can now be identified through radio observations, opening a direct observational pathway to their impact on exoplanetary environments.
Files
P2012_DavidKonijn_Poster_StellarTypeIII.pdf
Files
(23.2 MB)
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Additional details
Funding
- European Research Council
- Stormchaser 190136710
Dates
- Submitted
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2026-06-05