An Analytical Model for the Coronal Component of Major Solar Energetic Particle Events

Details An Analytical Model for the Coronal Component of Major Solar Energetic Particle Events An Analytical Model for the Coronal Component of Major Solar Energetic Particle Events

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...735....4k&link_type=abstract

The Astrophysical Journal, Volume 735, Issue 1, article id. 4 (2011).

Astronomy and Astrophysics

Astronomy

1

Acceleration Of Particles, Shock Waves, Sun: Corona, Sun: Particle Emission

Scientific paper

We formulate an analytical model of the coronal-phase acceleration observed in the beginning of major solar energetic particle (SEP) events, before the main-phase acceleration associated with coronal mass ejections (CMEs) in solar wind. The model is driven and constrained by the broadband observations of SEPs and CMEs, in particular SEP data from the particle telescope of the Energetic and Relativistic Nuclei and Electron (ERNE) experiment on the Solar and Heliospheric Observatory (SOHO) spacecraft, solar radio spectrograms, and low-corona observations of CMEs. The model is also verified against observations of solar high-energy neutrons and neutron-decay protons. The model suggests SEP acceleration above ~ 50 MeV nucleon-1 by coronal shock and the shock-amplified turbulence in closed magnetic structures, and particle release at magnetic reconnection between the closed structure of expanding CME and pre-existing open magnetic flux tubes. The analytical model connects parameters of coronal shocks and structures and the SEP parameters in space, which facilitates analysis of multiwavelength data and will assist in further development of coronal acceleration models.

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