Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...274...55g&link_type=abstract
Astronomy and Astrophysics, Vol. 274, NO. 1/JUL(I), P. 55, 1993
Astronomy and Astrophysics
Astrophysics
36
Scientific paper
We summarize the theory of transfer of synchrotron radiation, and the theory of plane perpendicular shock waves in a flow with relativistic bulk velocity and relativistic equation of state. We then describe the construction of a computer code that is based on these theories and on the differential Doppler boosting effect, for studying the emission properties from parsec-scale bent shocked extragalactic jets. This code solves the transfer equation along lines of integration parallel to the line of sight, thus taking into account the inhomogeneities in the physical parameters along the integration columns for jets with small viewing angles. Numerical simulations with this code with different bend patterns show that the existence of stationary components in both total and polarized flux density VLBI maps can be understood in terms of bends in the jet structure. For example a bend towards the observer can decrease the polarized flux density, resulting in two "apparent" components in the polarized flux density map, at both sides of the bent region along the jet axis.
Alberdi Antonio
Gomez Jos'e L.
Marcaide Juan Maria
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