Martín Hernández, J.M.Mármol Queraltó, E.Gorgas García, Francisco JavierCardiel López, NicolásSánchez Blázquez, PatriciaCenarro, A.J.Peletier, R. F.Vazdekis, A.Falcón Barroso, J.2023-06-202023-06-2020101570-659110.1007/978-3-642-11250-8_54https://hdl.handle.net/20.500.14352/43003© Springer-Verlag Berlin Heidelberg 2010. Scientific Meeting of the Spanish-Astronomical-Society (SEA) (8th; 2008; Santander-SPAIN).We are presenting new empirical fitting functions for the Lick/IDS line-strength indices as measured in MILES (Medium-resolution INT Library of Empirical Spectra). Following previous work in the field, these functions describe the empirical behaviour of the line-strength indices with the atmospheric stellar parameters (T_(eff), logɡ, [Fe/H]). In order to derive the fitting functions we have devised a new procedure which, being fully automatic, provides a better description of the line-strength index variations in the stellar parameter space.engjournal articlehttp://dx.doi.org/10.1007/978-3-642-11250-8_54https://link.springer.com/restricted access52Astrofísica