period-luminosity-relation

Machine Learning based variable star classification with Rubin Observatory Data Preview 1 with outputs including ranked candidate variable stars, diagnostic plots, and reproducible analysis notebooks.

The Cepheid Bias: Resolving the Hubble Tension — Environment-dependent Cepheid clock bias under TEP. Generative clock-aware model across 37 SH0ES hosts yields H0 = 66.65 ± 1.58 km/s/Mpc, consistent with Planck at 0.45σ. M31 and OGLE-IV differential tests confirm the predicted sign.