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Coherent Emission in AGN: A Critique
D. B. Melrose
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Publications of the Astronomical Society of Australia / Volume 19 / Issue 1 / 2002

Published online by Cambridge University Press:

05 March 2013, pp. 34-38
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The inverse Compton (IC) limit, TB1012 K, on synchrotron sources places a severe limit on models for intraday variables. The conventional limit is relaxed for proton synchrotron emission, or when acceleration balances IC losses. Coherent emission avoids the limit entirely but introduces other difficulties that have been inadequately discussed.