VSOP observations of the BL Lac object 2007+777 |
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| Authors: | C Jin TP Krichbaum A Witzel R Nan B Peng A Kraus A Lobanov S Qian JA Zensus |
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| Institution: | (1) Dipartimento di Fisica, Università della Calabria and Istituto Nazionale di Fisica della Materia, Unità di Cosenza, 87036 Arcavacata di Rende CS, Italia |
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| Abstract: | A numerical model of magnetic turbulence allows us to compute the diffusion coefficients for different degrees of anisotropy,
and in particular for the cases corresponding to the solar wind. We consider here the problem of the propagation of the energetic
particles accelerated by corotating interaction regions (CIRs) and observed by Ulysses at high heliographic latitudes. The
excursion in latitude of a magnetic field line located at large heliospheric distance is evaluated with a Monte Carlo simulation.
In the calculations, the random `force' terms are proportional to the square root of the diffusion coefficient in each direction.
By tracing a large number of field lines, we can devise how the particles would be seen by Ulysses. Good agreement with the
actual observations is found.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | BL Lac IDV structural variability |
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