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19942026
most citedThe Pisa pre-main sequence tracks and isochrones. A database covering a wide range of Z, Y, mass, and age values

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astro-ph.SR2026

A critical analysis of main-sequence fitting in open clusters to derive the helium-to-metal enrichment ratio

G. Valle, N. Ricci, M. Dell'Omodarme +3

We aim to investigate the feasibility of accurately determining the helium-to-metal enrichment ratio for open clusters using Gaia DR3 photometry. To test the reliability of…