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Henry Aurass (AIP)

Particle acceleration sites during solar eruptive processes
Wann Am 09.12.2014 von 14:00 bis 15:00
Was
  • Special Seminar
  • Kolloquium
Wo SH, Seminarraum
Termin übernehmen vCal / iCal

In 2002, Aurass, Vrsnak and Mann described an enigmatic bright flare radio source occurring during the impulsive flare phase (and sometimes again about ten minutes later) suggesting a radio shock signature without frequency drift. Cases with imaging data revealed a height between 0.3 and 0.4 Rs above the flaring active region at frequencies between 200 and 350 MHz, well above expectations based on coronal density models. Despite of clear and reproduced observational evidence there was much doubt about this finding (and speculations about radio signature of a standing reconnection outflow shock) in the community. In two recent papers (A&A 2013, Solar Phys. 2014) the study of a limb event led to the understanding of the physical nature of these sources. I will explain the essence of both papers and discuss its consequences for models of solar eruptive processes and coronal particle acceleration sites.