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Brightness Temperature Constraints to Compact Synchrotron Source Radiation Obtained from IDV and VLBI Observations

Published online by Cambridge University Press:  05 March 2013

K. I. Kellermann
K. I. Kellermann*
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA; kkellerm@nrao.edu
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Abstract

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We discuss the observational and theoretical constraints on the brightness temperature of compact opaque synchrotron sources. We consider the implication of observed apparent velocities on the amount of Doppler boosting and compare this with values deduced from directly measured brightness temperatures from ground and space based VLBI observations, as well as the implications of intraday variability. We also discuss the maximum rest frame brightness temperature expected under conditions of both inverse Compton cooling and equipartition conditions.

Keywords

galaxies: activequasars: generalgalaxies: jetsradiation mechanisms: non-thermal
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 19 , Issue 1 , 2002 , pp. 77 - 82
Copyright
Copyright © Astronomical Society of Australia 2002

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