VSOP Polarisation Images of Three BL Lac Objects

Details VSOP Polarisation Images of Three BL Lac Objects VSOP Polarisation Images of Three BL Lac Objects

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aspc..299...99g&link_type=abstract

High Energy Blazar Astronomy, ASP Conference Proceedings, Vol. 299, held 17-21 June 2002 at Tuorla Observatory, Piikkio, Finland

Astronomy and Astrophysics

Astronomy

5

Scientific paper

The paper presents new 6 cm VSOP space-VLBI polarisation results for the BL Lac objects 0954+658, 1418+546, and 1749+096. The added resolution provided by the orbiting antenna makes it possible to distinguish polarisation originating in the 6 cm VLBI core and the inner VLBI jet, which are both ascribed to the compact ``core'' in ground-based images. The images of the first two sources show the presence of longitudinal B fields in the inner 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 confirm the existence of a ``spine'' of transverse B field surrounded by a ``sheath'' of longitudinal field. The VSOP image of 1749+096 shows the emergence of strongly polarized new jet components in position angle ˜ -15°, with the B field in the innermost knot transverse to the jet.

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