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Silke Britzen

Silke Britzen. AGN jets and binary black holes. „Oscillating“ components in AGN? The case of 0716+714. I. Physikalisches Institut Universität zu Köln. The team at Bonn, Cologne, Paris & Beijing :. V. Meyer, N. Kudryavtseva, T. Krichbaum, I. Agudo, U. Bach,

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Silke Britzen

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  1. EVN - Symposium Silke Britzen AGN jets and binary black holes „Oscillating“ components in AGN? The case of 0716+714

  2. EVN - Symposium I. Physikalisches InstitutUniversität zu Köln The team at Bonn, Cologne, Paris & Beijing : V. Meyer, N. Kudryavtseva, T. Krichbaum, I. Agudo, U. Bach, A. Witzel, A. Zensus, A. Eckart, J. Roland, S. Qian

  3. EVN - Symposium 0716+714: well-known and still unknown • BL Lac object: redshift still unknown (>0.3) • Variable in all wavelength regimes • IDV: Still the only observed case for correlated radio-optical variability (Quirrenbach 1991) • Different apparent velocities: from sub- to superluminal 0.05 mas/year – 1.1 mas/year; e.g., Eckart et al. 87, Witzel et al. 88, Schalinski et al. 92, Gabuzda et al. 98, Perez-Torres et al. 04, Tian et al. 01, Jorstad et al. 01, Kellermann et al. 04, Bach et al. 05

  4. EVN - Symposium VLA VLBI (15 & 1.6 GHz) 20 mas Antonucci et al. 1986 0716+714: well-known and still unknown • …. and probably helical and certainly misaligned!

  5. EVN - Symposium 0716+714: radio flux-density variability UMRAO M. Aller V. Meyer

  6. EVN - Symposium 0716+714: VLBI at 8 GHz Meyer, Krichbaum, Agudo, Bach, Witzel, Zensus

  7. EVN - Symposium 0716+714: VLBI at 15 GHz 2 cm survey + Meyer, Krichbaum, Agudo, Bach, Witzel, Zensus

  8. EVN - Symposium 0716+714: VLBI at 22 GHz Meyer, Krichbaum, Agudo, Bach, Witzel, Zensus

  9. EVN - Symposium 0716+714: VLBI at 43 GHz Meyer, Krichbaum, Agudo, Bach, Witzel, Zensus

  10. EVN - Symposium 0716+714: early identification scenario Bach et al. 05

  11. EVN - Symposium 0716+714: 15 GHz + new data New data (V. Meyer) Bach et al. 05

  12. EVN - Symposium 0716+714: old + new identification scenario No longterm outward motion = Slow apparent Velocities!! New identification (V. Meyer) Bach et al. 05

  13. EVN - Symposium 0716+714: frequency dependence Motion in Position angle + Frequency dependence

  14. EVN - Symposium 0716+714: rectangular coordinates Rotation in rectangular coordinates

  15. EVN - Symposium Total flux-density at 15 GHz Position angle comp. a Flux core Fluxcomp. a CORRELATION!! Correlation between position angle & flux-density

  16. Supermassive Binary Black Holesin different evolutionary stages? optical X-ray optical NASA/CXC/MPE/S. Komossa et al. VLBI VLBI VLBI Hardcastle et al. 1996 Lobanov & Roland 2004 Murgia et al.

  17. EVN - Symposium Advantages of the new identification scenario • Position angle evolution now smooth !! • XY- tracks not random any more but show (some sort of ) rotation • No component ejections • Can explain long-term flux-density variability: correlation between position angle changes and flux-density!

  18. EVN - Symposium NEXT Talk on 1803+784 by Nadia • Similar effect ! • Oscillating components • Rotating jet • Position angle changes correlate with the flux-density evolution ….

  19. EVN - Symposium 0716+714: radio versus optical variability M. Aller V. Meyer

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