I've been trying to fit functions to plots showing photometric data for AGN from both optical and radio measurements, such as:

enter image description here

but my supervisor says that this shouldn't be done; the radio and optical components must be treated separately. Why is this?

  • $\begingroup$ Eyeballing it, it looks like different lines would fit the radio and optical parts... OB xkcd xkcd.com/2048 $\endgroup$
    – James K
    Nov 10, 2022 at 20:09
  • 2
    $\begingroup$ The two components are caused by two different physical mechanisms — synchrotron radiation from the jet, and the revolving material in the accretion disk , respectively — so there's no reason they should transition smoothly from one to the other. $\endgroup$
    – pela
    Nov 10, 2022 at 21:42


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