Statistics – Computation
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...406...36t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 406, no. 1, p. 36-46.
Statistics
Computation
1
Astronomical Models, Galactic Structure, Plasma Jets, Thermal Plasmas, Computational Astrophysics, Magnetohydrodynamics
Scientific paper
This paper presents a generalization of the method introduced in Pietrini and Torricelli-Ciamponi (1990) to model the evolution along z of jetlike axisymmetric structures. In this paper we allow for different radial profiles at different z distances from the nucleus, building up a step-wise structure which, in the limit of 'small' steps, can approach a continuous one. The influence of initial conditions in this kind of model is carefully analyzed, leading to the conclusion that some initial configurations prevent the existence of a 2D magnetic axisymmetric structure suitable for describing extragalactic jets. Intensity and polarization distributions associated with this kind of model are computed and turn out to be in accordance with the observations. As an example, the jet of 3C 31 is qualitatively described using a four-step structure.
Pietrini Paola
Torricelli-Ciamponi Guidetta
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