Electron energy partition in the ‘above-the-looptop’ solar hard X-ray sources

Conference · Tue Jul 21 04:00:00 EDT 2015

DOI:https://doi.org/10.1088/0004-637X/799/2/129· OSTI ID:1196189

Oka, Mitsuo ^[1]; Guo, Fan ^[2]

---

1. University of California, Berkeley
2. Los Alamos National Laboratory

The presentation begins by considering the non-thermal fraction of electron energies (R_ε) in 'above-the-looptop' (ALT). Several spectral models area considered: isothermal model, power-law, and the newly derived kappa distribution. Technically, all 3 non-thermal models can fit the data. In the discussion of flare scenario, energy partition, energization mechanism, and collisionality are considered. It is concluded that the kappa distribution works (R_ε ≲ 50%), magnetic reconnection scenario works, and Coulomb collisions may reduce the non-thermal fraction of electron energies.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: University of California, Berkeley
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1196189
• Report Number(s): LA-UR-15-25574
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Astronomy and Astrophysics