Supernova Time Dilation in Hybrid Expansion-Tired-Light Cosmologies

Dark Energy Survey has shown that the emission light curve widths $Δt_{\rm em}$ of supernovae increase to $Δt_{\rm obs}$, obeying $Δt_{\rm obs}/Δt_{\rm em}=(1+z)^b$ with $b=1.003\pm0.011$, excluding a nondilating redshift. We test hybrid models with $1+z=(1+z_p)(1+z_t)$ and the phenomenological stre