New calibrated models for the TRGB luminosity and a thorough analysis of theoretical uncertainties
Ippocratis D. Saltas,
Emanuele Tognelli
Abstract:The luminosity of the Tip of the Red Giant Branch (TRGB) is instrumental for the construction of the distance ladder, and its accurate modelling is key for determining the local Hubble parameter. In this work, we present an extensive quantitative analysis of the TRGB luminosity, accounting for virtually all input physics that affect it: chemical composition, opacity, diffusion, nuclear reaction rates, electron screening, neutrinos, convection efficiency, boundary conditions and mass loss, amongst others.Our an… Show more
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