AN ANALYTICAL MODEL FOR THE CORONAL COMPONENT OF MAJOR SOLAR ENERGETIC PARTICLE EVENTS

Journal Article · Fri Jul 01 00:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/735/1/4· OSTI ID:21576582

Kocharov, Leon; Valtonen, Eino ^[1]; Cho, Kyung-Suk ^[2]

---

1. Space Research Laboratory, Department of Physics and Astronomy, University of Turku, Turku FI-20014 (Finland)
2. Korea Astronomy and Space Science Institute, Hwaamdong, Yuseong-Gu, Daejeon 305-348 (Korea, Republic of)

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 {approx} 50 MeV nucleon{sup -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.

• OSTI ID: 21576582
• Journal Information: Astrophysical Journal, Vol. 735, Issue 1; Other Information: DOI: 10.1088/0004-637X/735/1/4; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCELERATION
EMISSION
MAGNETIC FLUX
MAGNETIC RECONNECTION
MASS
NEUTRONS
PROTONS
SHOCK WAVES
SOLAR CORONA
SOLAR PARTICLES
SOLAR WIND
ATMOSPHERES
BARYONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
NUCLEONS
RADIATIONS
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR RADIATION
STELLAR ACTIVITY
STELLAR ATMOSPHERES
STELLAR CORONAE
STELLAR RADIATION
STELLAR WINDS