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Session 11 - QSOs and Radio Galaxies.
Display session, Monday, June 08
Atlas Ballroom,

[11.08] VSOP Observations of 1928+738

D. Murphy, R. Preston, S. Tingay, D. Jones, D. Meier (JPL), J. Conway, A. Polatidis (Onsala Space Obs., Sweden), H. Hirabayashi, H. Kobayashi, Y. Murata (ISAS, Japan)

We present multi-epoch 5 GHz VLBI images of the quasar 1928+738 (z=0.3) made with the Japanese HALCA spacecraft co-observing with the VLBA and Effelsberg. Previous ground-based observations of this source have shown that the evolution of its VLBI-scale structure is consistent with a helical jet which may be caused by Kelvin-Helmholtz instabilities driven by the orbital motion in a massive binary binary black hole system. These multi-epoch space VLBI images are used to place further constraints on this model.

Program listing for Monday