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Title: Ultraheavy element enrichment in impulsive solar flares

Particle acceleration by cascading Alfvén wave turbulence was suggested as being responsible for energetic particle populations in {sup 3}He-rich solar flares. In particular, it was noted that the damping of the turbulence by the tail of the particle distribution in rigidity naturally leads to the dramatic enhancement of a pre-accelerated species—as {sup 3}He is posited to be—and superheavy elements. The subsequent detection of large enrichment of ultraheavies, relative to iron, has apparently confirmed this prediction, lending support to the original idea. It is shown here that this picture could be somewhat sharpened by progress in understanding the three-dimensional geometrical details of cascading Alfvén turbulence. The mechanism may be relevant in other astrophysical environments where the source of turbulence is nonmagnetic, such as clusters of galaxies.
Authors:
 [1]
  1. Physics Department, Ben-Gurion University, Be'er-Sheva I-84105 (Israel)
Publication Date:
OSTI Identifier:
22370520
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 794; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; ALFVEN WAVES; ASTROPHYSICS; DAMPING; DETECTION; DISTRIBUTION; FORECASTING; GALAXY CLUSTERS; HELIUM 3; IRON; PARTICLES; SOLAR FLARES; SUN; THREE-DIMENSIONAL CALCULATIONS; TRANSACTINIDE ELEMENTS; TURBULENCE