Cosmic distance duality as a probe of minimally extended varying speed
  of light
  We obtain the current constraint on the minimally extended varying speed of
light (meVSL) model by analyzing cosmic distance duality relation (CCDDR) of
it, $D_{L}/D_{A}(1+z)^{-2} = (1+z)^{b/8}$. We use the Pantheon type Ia
supernova (SNIa) data, the Hubble parameter $H(z)$ using the cosmic
chronometers approach, and the cosmic microwave background (CMB) distance
priors from the latest Planck data. We find that the current data show the
1-$\sigma$ deviation from the standard CCDDR. Thus, this provides the
constraint on meVSL model and future precision observations might be able to
put stronger constraints on it.
