Evidence for interaction with a surrounding medium in several BL lacertae objects.
In February 1997, we obtained multi-frequency polarization VLBA observations of 23 sources from a complete sample of northern BL Lac objects. Total intensity and linear polarization images of two sources (0745+241 and 0820+225) showing evidence for the presence of sheaths of longitudinal magnetic fi...
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| 格式: | Conference item |
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2002
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