Detailed Structure of the X-ray Jet in 4C 19.44 (=PKS1354+195)

Details Detailed Structure of the X-ray Jet in 4C 19.44 (=PKS1354+195) Detailed Structure of the X-ray Jet in 4C 19.44 (=PKS1354+195)

2006-10-25

arxiv.org/abs/astro-ph/0610755v1

Astronomy and Astrophysics

Astrophysics

To appear in "Black Holes: from Stars to Galaxies" Proceedings IAU Symp. No. 238, eds. V. Karas & G. Matt, 2 pages, 1 figure,

Scientific paper

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 about 6 at an angle no more than 10 degrees to the line of sight over deprojected distances about 150--600 kpc from the quasar, and with a magnetic field approximately 10 micro Gauss.

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