Stability of light curve solutions of DEBs for benchmark candidates in PLATO's LOPS2 field

Detached eclipsing binaries (DEBs) with radii and masses with precision sub-percent are poised to serve as benchmark stars for forthcoming space missions, like ESA’s PLATO mission. We are focusing on DEBs inPLATO's LOPS2 field, and these five benchmark candidates were observed in multiple TESS sectors, along with multi-epoch radial velocities and multi-band photometry. Using diverse modelling codes, we estimatestellar parameters from light-curve and radial-velocity modelling for each sector. We found an inconsistency in achieving sub-percent precision, significantly influenced by stellar activities and atmosphericparameters were derived via spectral disentangling with a focus on ensuring the consistency between multiple model-independent photometric and spectroscopic effective temperature estimates. The studyemphasises the critical role of precise parameter determination, highlighting its substantial impact on determining stellar ages accurately.