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

D. A. Schwartz, D. E. Harris, H. Landt, A. Siemiginowska, E. S. Perlman, C. C. Cheung, J. M. Gelbord, D. M. Worrall, M. Birkinshaw, S. G. Jorstad, A. P. Marscher, L. Stawarz

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)


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 very straight morphology. The 18˝ 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. Since published optical emission from the jet prohibits a single synchrotron spectrum producing the radio and X-ray emission, we interpret the X-ray emission as inverse Compton scattering on the cosmic microwave background. With the aid of assumptions about jet alignment, equipartition between magnetic field and relativistic electron 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 distances ˜150-600 kpc from the quasar, and a magnetic field ˜10 μGauss. X-ray emission is also seen throughout a ˜10˝ extension to the S of the jet, in a region where the radio emission is fainter, and also in the S radio lobe.
Original languageEnglish
Title of host publicationBlack Holes
Subtitle of host publicationFrom Stars to Galaxies - Across the Range of Masses
EditorsVladimir Karas, Giorgio Matt
Place of PublicationCambridge, UK
PublisherCambridge University Press
ISBN (Print)9780521863476
Publication statusPublished - 1 Aug 2007

Publication series

NameProceedings of the International Astronomical Union Symposia and Colloquia


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