Solutions of the Einstein–Maxwell equations with energy–momentum tensor for polytropic core and linear envelopeS. A. Mardan, A. Khalid, Sana Saleem and Muhammad Bilal RiazEur. Phys. J. C, 85 2 (2025) 177DOI: https://doi.org/10.1140/epjc/s10052-025-13890-y