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The Inverse Compton Effect in Extra-Galactic Radio Sources

Published online by Cambridge University Press:  25 April 2016

I. D. Johnston  and
G. P. Rothman
I. D. Johnston
Affiliation:
School of Physics, University of Sydney
G. P. Rothman
Affiliation:
School of Physics, University of Sydney
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Extract

It was first pointed out by Hoyle et al. that quasars if they are indeed located at cosmological distances, must be characterized by an extraordinarily large radiation density : and therefore, though their optical and near infra-red spectra appear to be dominated by synchrotron radiation, any ultrarelativistic electron present must necessarily lose essentially all its energy by inverse Compton scattering. This would mean that, though quasars are emitting fantastic amounts of energy at optical frequencies, they must also be emitting many orders of magnitude more at X-ray and γ-ray frequencies. This paradox has been evaded by several specially constructed models (e.g. Rees and Sciama, Woltjer and Jukes); but the problem has not been removed in general.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 3 , February 1968 , pp. 105 - 106
Copyright
Copyright © Astronomical Society of Australia 1968

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References

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