Effects of the turbulent ISM on radio observations of quasars

Details Effects of the turbulent ISM on radio observations of quasars Effects of the turbulent ISM on radio observations of quasars

2006-12-15

arxiv.org/abs/astro-ph/0612421v1

Astronomy and Astrophysics

Astrophysics

6 pages, 1 figure, to appear in the conf. proceedings of the 8th EVN Symposium, Torun, September 2006

Scientific paper

In radio bands, the study of compact radio sources can be affected by propagation effects through the Interstellar Medium. These are usually attributed to the presence of turbulent intervening plasma along the line of sight. Here, two of such effects are presented. The line of sight of B 2005+403 passes through the heavily scattered region of Cygnus, which causes substantial angular broadening of the source images obtained at frequencies between 0.6 GHz and 8 GHz. At higher frequencies, however the intrinsic source structure shines through. Therefore, multi-frequency VLBI observations allow to study the characteristics of the intervening material, the source morphology and the "coupling" of them in forming the observed image.

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