Paper:	Variability and Brightness Temperature
Volume:	300, Radio Astronomy at the Fringe
Page:	169
Authors:	Valtaoja, E.; Savolainen, T.; Wiik, K.; Lahteenmaki, A.
Abstract:	We compare two methods of estimating the brightness temperatures of synchrotron sources, VLBI and flux variability. The latter method is not observationally limited, and shows that Tb,obs(var) = Tb,int · D3 < 1015 K. Comparing VLBI and variability data, we find that Tb,int ≈ 5 × 1010 K, closer to the equipartition limit than to the inverse Compton limit.

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