Constraints on the M_⋆, β parameter space, obtained for explaining the origin of AT 2019avd as a DTDE on SMBH. Red markers represent a permitted M_⋆, β configuration, whilst a region that contains grey hashing represents a configuration that is not able to reproduce the observed timescales for the given peak. Results were obtained for a black hole with log [M_BH∕M_⊙] ~ 6.3. Since there are no red markers on the second optical peak plot, there is no permitted M_⋆, β pairing that can reproduce the observed peak timescale for the second optical peak. The black dashed lines bound 0.3 M_⊙ < M_⋆ < 22 M_⊙, where we adopt γ = 4∕3.