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The jet of 3C 273 observed with ROSAT HRI *
H.-J. Röser 1,
K. Meisenheimer 1,
M. Neumann 1,
R.G. Conway 2 and
R.A. Perley 3
Received 31 March 2000 / Accepted 24 May 2000
ROSAT HRI observations of 3C 273 reveal X-ray emission all along the optically visible jet with the peak of emission at the inner end. Whereas the X-ray emission from the innermost knot A is consistent with a continuation of the radio-to-optical synchrotron continuum, a second population of particles with higher maximum energy has to be invoked to explain the X-ray emission from knots B, C and D in terms of synchrotron radiation. Inverse Compton emission could account for the X-ray flux from the hot spot. We detect a faint X-ray halo with a characteristic scale of 29 kpc and particle density on the order of m-3, higher than previously thought.
Key words: acceleration of particles radiation mechanisms: non-thermal galaxies: active galaxies: jets galaxies: quasars: individual: 3C 273
* Based on observations with the ROSAT X-ray satellite and also on data collected with the VLA (The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.) and at the European Southern Observatory, Chile (ESO No 51-2-021).
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Online publication: July 27, 2000