Radio Scattering Observations of Turbulence in the Solar Wind and the Interstellar Medium. Steven R. Spangler University of Iowa. Basic physics of extracting information on astrophysical plasma turbulence: the radio refractive index.
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Radio Scattering Observations of Turbulence in the Solar Wind and the Interstellar Medium
Steven R. Spangler
University of Iowa
Bamert, Kallenbach, et al, 2004
Results from Woo and Schwenn, JGR 96, 21227, 1991
MHD Shocks in the Solar Wind
Comparison and compatibility between two sets of observations not thoroughly explored. There is much to learn.
The Interstellar Medium
The ISM has powerful shock waves (supernova remnants) that accelerate the cosmic rays. Image from Univ. of Wisconsin WHAM instrument, R. Reynolds, M. Haffner, et al
Spitler and Spangler, ApJ 632, 932, 2005
Radio Results on Coronal Turbulence I:
Speed of irregularities << VA : Irregularities are non-propagating or oblique AIC waves
Radio Results on Coronal Turbulence II:
Density spectrum power law with “bulge” at ion inertial length (Coles and Harmon, 1989ff)
Radio Results on Coronal Turbulence III:
Smooth variation of turbulent intensity with heliocentric distance; no coronal “Kumasphere”. Not unanimous; see Lotova