Triangle for the entropic index q of non-extensive statistical mechanics observed by Voyager 1 in the distant heliosphere

L.F. Burlaga and A.F. -Viñas

Physica A: Statistical Mechanics and its Applications, 2005, vol. 356, issue 2, 375-384

Abstract: Tsallis [Physica A 340 (2004) 1] identified a set of numbers, the “q-triplet” ≡{qstat, qsen, qrel}, for a system described by nonextensive statistical mechanics. The deviation of the q's from unity is a measure of the departure from thermodynamic equilibrium. We present observations of the q-triplets derived from two sets of daily averages of the magnetic field strength B observed by Voyager 1 in the solar wind near 40AU during 1989 and near 85AU during 2002, respectively. The results for 1989 do not differ significantly from those for 2002. We find qstat=1.75±0.06, qsen=-0.6±0.2, and qrel=3.8±0.3.

Keywords: Nonlinear dynamics; Nonextensive statistical mechanics; Metastable states; Mixing; Weak chaos; q-triplet; Heliospheric magnetic field (search for similar items in EconPapers)
Date: 2005
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:356:y:2005:i:2:p:375-384

DOI: 10.1016/j.physa.2005.06.065

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