Prospects for radio detection of stellar plasma beams

H. K. Vedantham*

*Corresponding author for this work

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review

2 Citations (Scopus)

Abstract

Violent solar eruptions are often accompanied by relativistic beams of charged particles. In the solar context they are referred to as solar particle events and are known to generate a characteristic swept-frequency radio burst. Due to their ionising potential, these beams influence atmospheric chemistry and habitability. Radio observations provide a crucial discriminant between stellar flares that do and do not generate particle beams. Here I use solar empirical data and semi-quantitative theoretical estimates to gauge the feasibility of detecting the associated radio bursts. My principal conclusion is that a dedicated search for swept frequency radio bursts on second timescales in existing low-frequency (ν ? 102 MHz) datasets, while technically challenging, will likely provide the evidence high-energy particles beams in Sun-like stars.

Original languageEnglish
Article number7
Number of pages5
JournalAstronomy & astrophysics
Volume639
DOIs
Publication statusPublished - 13-Jul-2020

Keywords

  • stars: coronae
  • radiation mechanisms: non-thermal
  • radio continuum: stars
  • plasmas
  • BURSTS

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