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

  • D. A. Schwartz (a1), D. E. Harris (a1), H. Landt (a1), A. Siemiginowska (a1), E. S. Perlman (a2), C. C. Cheung (a3), J. M. Gelbord (a4), D. M. Worrall (a5), M. Birkinshaw (a5), S. G. Jorstad (a6), A. P. Marscher (a6) and L. Stawarz (a7)...

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.

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References

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Celotti, A., Ghisellini, G. & Chiaberge, M. 2001, MNRAS, 321, L1
Sambruna, R. M. et al. 2004, ApJ, 608, 698
Schwartz, D. A. et al. 2006, ApJ, 640, 592
Tavecchio, F., Maraschi, L., Sambruna, R. M. & Urry, C. M. 2000, ApJ, 544, L23
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Detailed structure of the X-ray jet in 4C 19.44 (PKS1354+195)

  • D. A. Schwartz (a1), D. E. Harris (a1), H. Landt (a1), A. Siemiginowska (a1), E. S. Perlman (a2), C. C. Cheung (a3), J. M. Gelbord (a4), D. M. Worrall (a5), M. Birkinshaw (a5), S. G. Jorstad (a6), A. P. Marscher (a6) and L. Stawarz (a7)...

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