Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.0412k&link_type=abstract
American Astronomical Society, HEAD meeting #8, #04.12; Bulletin of the American Astronomical Society, Vol. 36, p.910
Astronomy and Astrophysics
Astronomy
Scientific paper
We present results from our Chandra observations of the nearby radio galaxy Centaurus A. Cen A has been observed with ACIS four times over a ˜4.5 year baseline. These deep observations show significant structure in the jet and allow us to map the morphology of the X-ray knots as well as search for variations in flux or spectra to constrain models of particle acceleration in jets. Comparisons with the M87 jet will be presented.
Our most recent observations (2×50 ks with ACIS-S) also permit a detailed study of the cavities and shocks associated with the inner radio lobes. For the southwest lobe, we measure temperature gradients in the shock-heated gas behind the bow shock, and estimate the viscosity of the ISM from the sharpness of the shock. We also detect a shell of X-ray emission around the NE radio lobe. We measure the thermodynamic parameters of the emitting gas, and compare the properties of the NE lobe with the much more X-ray luminous shell around the SW lobe.
This work was supported by NASA contracts NAS8-38248, NAS8-39073, and GO3-4119X.
Forman William R.
Hardcastle Martin J.
Jones Christine
Kraft Ralph Porter
Murray Stephen S.
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