Deceleration from Entrainment in the Jet of the Quasar 1136−135?

F. Tavecchio, L. Maraschi, R. M. Sambruna, M. Gliozzi, C. C. Cheung, J. F. C. Wardle, C. Megan Urry
2006 Astrophysical Journal  
Modeling the multiwavelength emission of successive regions in the jet of the quasar PKS 1136-135 we find indication that the jet suffers deceleration near its end on a (deprojected) scale of ~400 kpc. Adopting a continuous flow approximation we discuss the possibility that the inferred deceleration from a Lorentz factor Gamma=6.5 to Gamma=2.5 is induced by entrainment of external gas. Some consequences of this scenario are discussed.
doi:10.1086/500536 fatcat:ct4mo4rphbaulguhs5kvbwgwqu