S. Parenti et al. 2006 ApJ 651 1219 doi:10.1086/507594
S. Parenti1,5, E. Buchlin2,6, P. J. Cargill3, S. Galtier4 and J.-C. Vial4
Show affiliationsThe statistical properties of the radiative signature of a coronal loop subject to turbulent heating obtained from a three-dimensional (3D) magnetohydrodynamics (MHD) model are studied. The heating and cooling of a multistrand loop is modeled and synthetic spectra for Fe XII 195.12, Fe XV 284.163, and Fe XIX 1118.06 Å are calculated, covering a wide temperature range. The results show that the statistical properties of the thermal and radiative energies partially reflect those of the heating function in that power-law distributions are transmitted, but with very significant changes in the power-law indices. There is a strong dependence on the subloop geometry. Only high-temperature radiation (≈107 K) preserves reasonably precise information on the heating function.
methods: statistical; MHD; Sun: corona; Sun: flares; Sun: UV radiation; techniques: spectroscopic; turbulence
Issue 2 (2006 November 10)
Received 2006 February 22, accepted for publication 2006 July 11
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