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Two-Component jets and the Fanaroff-Riley Dichotomy

Two-Component jets and the Fanaroff-Riley Dichotomy. CPA, KULeuven, Belgium. Zakaria Meliani. Rony Keppens (CPA- KU Leuven), Christophe Sauty (Observatoire de Paris). Active galactic nuclei dichotomy. Cygnus A VL A. Fanaroff-Riley I I Hot Spots dominated “ classical doubles ”.

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Two-Component jets and the Fanaroff-Riley Dichotomy

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  1. Two-Component jets and the Fanaroff-Riley Dichotomy CPA, KULeuven, Belgium Zakaria Meliani Rony Keppens (CPA- KU Leuven), Christophe Sauty (Observatoire de Paris) MPIfRA

  2. Active galactic nuclei dichotomy Cygnus A VLA Fanaroff-RileyII Hot Spots dominated “classical doubles” central engine factor? Fanaroff-Riley I jet dominated 3C 449 VLA MPIfRA

  3. Active galactic nuclei jet • Aligned up to Mpc • Accretion disk • v ~ 0.94-0.9994 Observations Accretion disk MPIfRA

  4. Models (Two-component outflow) • Fast- low density inner wind • Observations in high energy : • Observations in radio : • Slow- low density outer flow Differential rotation MPIfRA

  5. Jet launching • Ejection from disk Jet • Ejection from inner corona wind Results The energy and angular Momentum is extract by jet and wind Meliani, Casse, Sauty, 2006 MPIfRA

  6. 3D Two-component jet 3D High energy flux inner jet Jet remains relativistic and collimate Fast growing of RT instabilities 3D Low energy flux inner jet Logarithm of the commoving frame density MPIfRA

  7. High energy flux inner flow Logarithm of the commoving frame density MPIfRA

  8. Interface stability Pressure Centrifugal force Rotation Centrifugal force - pressure equilibrium can be instable Angular momentum extraction from the inner jet Analogous of Rayleigh-Taylor instability MPIfRA

  9. Conclusion • Two-component jet models could use to explain the classification of the Fanaroff-Riley radio source • Outflows with high energy flux inner component decelerate and de-collimate • Outflows with low energy flux inner component remain collimate and relativistic MPIfRA

  10. Rotation in the jet Jet rotation The jet speed increase toward the axis The jet has two component. Bacciotti et al. 2002 MPIfRA

  11. Two-component outflow Hot – rarefied –turbulent Cold – dense - collimated “Onion-like” structure slow sheath around fast core Jet-wind interaction The transverse variation Inner wind Outer jet V ~ Vesc→ faster outflow is launched closer to the axis MPIfRA

  12. Sursauts gamma: à haute résolution (107 × 105) Zoom : ×103 Zoom :×102 MPIfRA

  13. Transverse cross-section (2.5D) Case I Low energy flux inner flow 5% Case II High energy flux inner flow 30% Modeling MPIfRA

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