Prospects for radio detection of stellar plasma beamsVedantham, H. K., 13-Jul-2020, In : Astronomy & astrophysics. 639, 5 p., 7.
Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review
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.
- stars: coronae, radiation mechanisms: non-thermal, radio continuum: stars, plasmas, BURSTS