Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002evn..conf...83g&link_type=abstract
6th European VLBI Network Symposium on New Developments in VLBI Science and Technology, held in Bonn, June 25th-28th 2002, proce
Astronomy and Astrophysics
Astronomy
2
Scientific paper
VSOP space-VLBI polarisation observations have proven very fruitful, both confirming some predictions based on earlier ground-based VLBI studies and providing fresh insight into the magnetic field structures of the jets of AGN. These new VSOP polarisation images of 0954+658 and 1418+546 make it possible to distinguish polarisation originating in the 6 cm VLBI core and the innermost VLBI jet, which are blurred together in the ground-array image. The images of both sources reveal the presence of longitudinal B fields in the innermost jets, with rapid reversals in the dominant field direction on scales of less than a milliarcsecond. In the case of 1418+546, the VSOP observations indicate the existence of a ``spine'' of transverse B field surrounded by a ``sheath'' of longitudinal field, with a rapid alternation between longitudinal and transverse fields in the inner 5 mas of the jet.
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