Empirical low-metallicity pre-main-sequence optical spectral templates derived from VLT/MUSE observations

We present a set of ten empirical optical spectral templates for low-metallicity (Z ≈ 0.2 Z⊙) pre-main-sequence stars, constructed from VLT/MUSE integral-field spectroscopic observations of members of the Galactic cluster Dolidze 25. The templates span effective temperatures from 3290 to 4170 K and are flux calibrated, extinction corrected using the Gordon et al. (2023) extinction law with object-specific A_V values. These templates are intended for spectral classification, stellar parameter estimation, and accretion studies in metal-poor star-forming environments.