Image Details
Caption: Figure 6.
Evolution of the VLBI core size and inferred expansion velocity of TXS 0506+056 at 15 GHz in 2020. The solid curves show ﹩{{\rm{FWHM}}}_{{\rm{\min }}}﹩, FWHMmaj, and FWHMeff in parsecs (left axis), while the dashed curves show the corresponding expansion velocities in units of c (right axis).
© 2026. The Author(s). Published by the American Astronomical Society.