Dark Energy with Constant Inertial Mass Density: Updated Constraints and Curvature-Induced Sign Transitions in ${\rho }_{\mathrm{DE}}$ and ${\rho }_{\mathrm{DE}}+p_{\mathrm{DE}}$

Luis A. Escamilla, Berat Karadavut, Nihan Katırcı

We present updated observational constraints on the simple-gDE model, characterized by a constant inertial mass density (IMD) ${\rho }_{\mathrm{DE}}+p_{\mathrm{DE}}$,which belongs to the broader g…