edu.ucar.opensky::articles:43312 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:51:43.709654 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d7v410mq Exploring the origin of solar energetic electrons. II. Investigating turbulent coronal acceleration 2025-04-10T00:00:00Z publication https://n2t.net/ark:/85065/d7v410mq https://doi.org/10.3847/1538-4357/adbaf4 Pallister, R. author Jeffrey, N. L. S. author Stores, Morgan author UCAR/NCAR - Library publisher Nonthermal particle acceleration in the solar corona is evident from both remote hard X-ray sources in the chromosphere and direct in situ detection in the heliosphere. Correlation of spectral indices between remote and in situ energy spectra presents the possibility of a common source-acceleration region within the corona, however the properties and location of this region are not well constrained. To investigate this, we perform a parameter study for both the properties of the ambient plasma of a simulated acceleration region and the turbulent acceleration profile acting on an initially isotropic thermal electron population. We find that independently varying the turbulent acceleration timescale &#964; acc , acceleration profile standard deviation &#963; , and acceleration region length L result in an in situ spectral index variation of between 0.5 and 2.0 at 1.0 au for &#160;&lt;100 keV electrons. Short-timescale turbulent scattering in the flaring corona steepens the spectra by ~0.5. It was also found that the in situ spectral index &#948; derived from the peak electron flux produces a spectral index ~1.6 harder than that from a full-flare X-ray photon flux (of spectral index &#947; ) simulated with the same intermediate parameters. Previous studies have indicated an approximate &#948; &#160;&#8776;&#160; &#947; relationship for selected flares with measured in situ electron and X-ray photon observations, suggesting that an extended source region with nonuniform plasma and/or acceleration properties may be necessary to reproduce this relationship. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication <span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation