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Non-thermal velocities in flare plasmas

Benna, C.; Antonucci, E.; Martin, R. +1 more

The analysis of the profile and intensity of the soft X-ray lines formed in the wavelength range from 1.8 Angstroms to 20 Angstroms, observed with the Soft X-ray Polychromator of the Solar Maximum Mission (SMM), shows that solar flare plasmas are characterized by non-thermal velocities. Flare plasmas in general consist of two components at differe…

Transport of energetic particles derived from a detailed analysis of the September 29, 1989 solar flare

Vainio, R.; Torsti, J.; Anttila, A. +1 more

The exceptionally energetic flare of September 29, 1989, at 11:33 UT has been analyzed using neutron monitor data and the energy resolved particle data collected by the GOES satellites. A picture emerges of a dual injection in the impulsive, explosive phase of the flare process, with an additional gradual source mechanism traced to the shock front…