[AGN, Quasars, Black Holes -- Oral ]
Centaurus A: Interaction of a Radio Source with its Environment
Paul Nulsen, Harvard-Smithsonian Center for Astrophysics
RP Kraft (CfA), D Stark (CfA), JH Croston (Southampton), MJ Hardcastle (Hertfordshire), M Birkinshaw (Bristol), DM Worrall (Bristol), GR Sivakoff (Virginia), A Jordan (Ohio State), NJ Brassington (CfA), DA Evans (MIT), WR Forman (CfA), M Gilfanov (MPE), JL Goodger (Hertfordshire), C Jones (CfA), WE Harris (McMaster), AM Juett (GSFC), SS Murray (CfA), S Raychaudhury (Birmingham), CL Sarazin (Virginia), R Voss (MPE), KA Woodley (McMaster)
Deep Chandra observations have been used to investigate the
impact of Centaurus A, the nearest extragalactic radio source, on its
environment. The southwest radio lobe drives a shock into the interstellar
medium. In low density regions where the shock is strong, X-ray emission
from the shocked gas is predominantly synchrotron radiation. The radio
jet to the northeast also shows significant X-ray synchrotron emission.
A simple flow model for the jet requires significant dissipation within
the jet, most likely due to the entrainment of mass lost by stars lying
in the path of the jet. Some implications will be discussed.