Tsallis Statistics of the Magnetic Field in the Heliosheath

Details Tsallis Statistics of the Magnetic Field in the Heliosheath Tsallis Statistics of the Magnetic Field in the Heliosheath

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...644l..83b&link_type=abstract

The Astrophysical Journal, Volume 644, Issue 1, pp. L83-L86.

Astronomy and Astrophysics

Astronomy

23

Magnetic Fields, Sun: Solar Wind, Turbulence, Waves

Scientific paper

The spacecraft Voyager 1 crossed the termination shock on 2004 December 16 at a distance of 94 AU from the Sun, and it has been moving through the heliosheath toward the interstellar medium since then. The distributions of magnetic field strength B observed in the heliosheath are Gaussian over a wide range of scales, yet the measured profile appears to be filamentary with occasional large jumps in the magnetic field strength B(t). All of the probability distributions of changes in B, dBn≡B(t+τ)-B(t) on scales τ from 1 to 128 days, can be fit with the symmetric Tsallis distribution of nonextensive statistical mechanics. At scales >=32 days, the distributions are Gaussian, but on scales from 1 through 16 days the probability distribution functions have non-Gaussian tails, suggesting that the inner heliosheath is not in statistical equilibrium on scales from 1 to 16 days.

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