The Physics of 100 kpc X-ray Jets

Details The Physics of 100 kpc X-ray Jets The Physics of 100 kpc X-ray Jets

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003head....7.0908s&link_type=abstract

American Astronomical Society, HEAD meeting #7, #09.08; Bulletin of the American Astronomical Society, Vol. 35, p.863

Astronomy and Astrophysics

Astronomy

Scientific paper

We discuss the structure of four quasar jets, as revealed by our Chandra X-ray and ATCA and VLA radio observations. These four jets gave the largest numbers of X-ray counts during our 5 ksec observations of the first 16 of a sample of FR II radio jets. When we interpret the X-ray emission as inverse Compton scattering off the Cosmic Microwave Background, we infer that these jets must be relativistically beamed on scales of 200 to 500 kpc, if the particles and magnetic fields are anywhere near equipartition in the jet rest frames. This gives magnetic field strengths of order 10-5 Gauss in the rest frame of the jet, and bulk relativistic Doppler factors in the range 2 to 10. We can then deduce the minimum kinetic power carried by the jets, which is comparable to or larger than the quasar bolometric luminosity. Thus the jets must be a significant factor in the energetics of the accretion process powering the central black hole. The measured radiative efficiency of the jets is quite low, from 0.2 to 1.2 per cent, consistent with their ability to transport energy out to large distances.
This research has been funded in part by NASA contract NAS8-39073 to SAO, and SAO SV1-61010 to MIT, and NASA grant GO2-3151C to SAO. E.S.P. acknowledges support from NASA LTSA grant NAG5-9997. Part of this research was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA. This research has made use of the NASA/IPAC Extragalactic Database (NED), operated by JPL/CIT under contract with NASA.

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