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Inverse Compton X-Rays from Giant Radio Galaxies

Published online by Cambridge University Press:  25 May 2016

D. Tsakiris ,
J.P. Leahy ,
R.G. Strom  and
C.R. Barber
D. Tsakiris
Affiliation:
1 University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire SK11 9DL, England
J.P. Leahy
Affiliation:
1 University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire SK11 9DL, England
R.G. Strom
Affiliation:
2 Netherlands Foundation for Radio Astronomy, Radiosterrenwacht Dwingeloo, Postbus 2, NL-7990 AA Dwingeloo, The Netherlands
C.R. Barber
Affiliation:
3 University of Leicester, Department of Physics and Astronomy, Leicester, LE1 7RH, England

Extract

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The X-ray radiation from inverse Compton scattering of CMB photons by the relativistic electrons in ‘radio’ lobes provides a direct measure of their column density at a known energy, unlike synchrotron radiation which also depends on the unknown magnetic field. Thus by combining inverse Compton and radio data we can separately determine the particle energies and field strengths, rather than having to rely on uncertain estimates like minimum energy. The predicted flux is and strong IC signal requires high radio flux and low magnetic field, properties of giant radio galaxies. On the other hand the minimum detectable count rate, Imin, increases with the target size due to the larger background contribution. As a result the detectability of IC X-rays for ROSAT PSPC B measurements is roughly, assuming a spectral index of 0.75. After making detailed prediction of SIC for a number of objects of the 3CR sample, the best candidates were 3C 236, 3C 326, and 4C 73.08.

Type
Relation between Radio and Other Wavelenghts
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 256 - 258
Copyright
Copyright © Kluwer 1996 

References

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