Intrinsic Kinematics of Moving Components in Curved Relativistic Jets

  • L. Lara
  • A. Alberdi
Conference paper
Part of the International Astronomical Union book series (IAUS, volume 175)


Superluminal motion in extragalactic jets is successfully explained assuming a relativistic flow of material in a direction close to the observer’s line of sight. In rectilinear jets, the apparent velocity measured by the observer (β app ) is related with the intrinsic velocity of the moving component (β)and the angle between the jet direction and the observer’s line of sight (θ) through the equation (eg. Rees 1966, Nature 211, p.468):
$${{\beta }_{{app}}} = \frac{{\beta \cdot \sin \theta }}{{1 - \beta \cdot \cos \theta }}$$


Flux Density Spectral Index Radio Source Position Angle Turnover Frequency 
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Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • L. Lara
    • 1
    • 2
  • A. Alberdi
    • 2
    • 3
  1. 1.IRA - CNRBolognaItaly
  2. 2.IAA - CSICGranadaSpain
  3. 3.LAEFFMadridSpain

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