Where Centaurus A gets its X-ray knottiness
Worrall, D.M., Birkinshaw, M., Kraft, R.P., Sivakoff, G.R., Jordan, A., Hardcastle, M.J., Brassington, Nicola, Croston, J.H., Evans, D.A., Forman, W.R., Harris, W.E., Jones, C., Juett, A.M., Murray, S.S., Nulsen, P.E.J., Raychaudhury, S., Sarazin, C.L. and Woodley, K.A.
(2008)
Where Centaurus A gets its X-ray knottiness.
L135-L138.
ISSN 0004-637X
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.
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| Date Deposited | 18 Nov 2024 12:28 |
| Last Modified | 18 Nov 2024 12:28 |