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28 March 2024
 
  » arxiv » 0712.3579

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Where Centaurus A gets its X-ray knottiness
D.M. Worrall ; M. Birkinshaw ; R.P. Kraft ; G.R. Sivakoff ; A. Jordan ; M.J. Hardcastle ; N.J. Brassington ; J.H. Croston ; D.A. Evans ; W.R. Forman ; W.E. Harris ; C. Jones ; A.M. Juett ; S.S. Murray ; P.E.J. Nulsen ; S. Raychaudhury ; C.L. Sarazin ; K.A. Woodley ;
Date 20 Dec 2007
AbstractWe 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.
Source arXiv, 0712.3579
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