Refer to the link: https://www.astro.utoronto.ca/DDO/research/cepheids/cepheids.html

Tha author has used the relationship $M_V=-2.902log(P)-1.203$. It is mentioned that this is not corrected for metallicity.

My question is how we could correct this for metallicity using SIMBAD $[Fe/H]$ values for individual stars, or otherwise using some other free & publicly available data.

I am open to suggestions.


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