Detailed structure of the X-ray jet in 4C 19.44 (PKS1354+195).

Authors :: Schwartz, D. A.
Harris, D. E.
Landt, H.
Siemiginowska, A.
Perlman, E. S.
Cheung, C. C.
Gelbord, J. M.
Worrall, D. M.
Birkinshaw, M.
Jorstad, S. G.
Marscher, A. P.
Stawarz, L.
Source :: Proceedings of the International Astronomical Union; 08/05/2006, Vol. 2 Issue S238, p443-444, 2p
Publication Year :: 2006
Abstract: We investigate the variations of the magnetic field, Doppler factor, and relativistic particle density along the jet of a quasar at z=0.72. We chose 4C 19.44 for this study because of its length and straight morphology. The 18 arcsec length of the jet provides many independent resolution elements in the Chandra X-ray image. The straightness suggests that geometry factors, although uncertain, are almost constant along the jet. We assume the X-ray emission is from inverse Compton scattering of the cosmic microwave background. With the aid of assumptions about jet alignment, equipartition between magnetic-field and relativistic-particle energy, and filling factors, we find that the jet is in bulk relativistic motion with a Doppler factor ≈ 6 at an angle no more than 10∘ to the line of sight over de-projected distances ≈ 150–600 kpc from the quasar, and with a magnetic field ≈10 μGauss. [ABSTRACT FROM PUBLISHER]