Large-scale sidereal anisotropy of multi-TeV galactic cosmic rays and the heliosphere - Astrophysics > Astrophysics of GalaxiesReportar como inadecuado




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Abstract: We develop a model anisotropy best-fitting to the two-dimensional sky-map ofmulti-TeV galactic cosmic ray GCR intensity observed with the Tibet III airshower AS array. By incorporating a pair of intensity excesses in thehydrogen deflection plane HDP suggested by Gurnett et al., together with theuni-directional and bi-directional flows for reproducing the observed globalfeature, this model successfully reproduces the observed sky-map including the-skewed- feature of the excess intensity from the heliotail direction, whosephysical origin has long remained unknown. These additional excesses aremodeled by a pair of the northern and southern Gaussian distributions, eachplaced ~50 degree away from the heliotail direction. The amplitude of thesouthern excess is as large as ~0.2 %, more than twice the amplitude of thenorthern excess. This implies that the Tibet AS experiment discovered for thefirst time a clear evidence of the significant modulation of GCR intensity inthe heliotail and the asymmetric heliosphere.



Autor: M. Amenomori, X. J. Bi, D. Chen, S. W. Cui, Danzengluobu, L. K. Ding, X. H. Ding, C. Fan, C. F. Feng, Zhaoyang Feng, Z. Y. Feng,

Fuente: https://arxiv.org/







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