Where Centaurus A Gets Its X-Ray Knottiness Academic Article uri icon

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abstract

  • We report an X-ray spectral study of the transverse structure of the Centaurus A jet using new data from the Chandra Cen A Very Large Project. We find that the spectrum steepens with increasing distance from the jet axis, and that this steepening can be attributed to a change in the average spectrum of the knotty emission. Such a trend is unexpected if the knots are predominantly a surface feature residing in a shear layer between faster and slower flows. We suggest that the spectral steepening of the knot emission as a function of distance from the jet axis is due to knot migration, implying a component of transverse motion of knots within the flow.

authors

  • Worrall, DM
  • Birkinshaw, M
  • Kraft, RP
  • Sivakoff, GR
  • Jordán, A
  • Hardcastle, MJ
  • Brassington, NJ
  • Croston, JH
  • Evans, DA
  • Forman, WR
  • Harris, William Edgar
  • Jones, C
  • Juett, AM
  • Murray, SS
  • Nulsen, PEJ
  • Raychaudhury, S
  • Sarazin, CL
  • Woodley, KA

publication date

  • February 1, 2008