A two-filter infrared Wesenheit magnitude, W(J,3.6), simultaneously corrects Cepheid distances for extinction and metallicity, as shown with PHOENIX model atmospheres and calibrated with Milky Way, LMC, and IC 1613 Cepheids.
2003 for a comprehensive review of the systematic trending of this feature in the extinction curves for the Milky Way, LMC and SMC)
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Chicago-Carnegie Hubble Program (CCHP) A Multi-Wavelength Search for the Effects of Metallicity on the Cepheid Distance Scale. Part II: Theoretical Models and Synthetic Spectra
A two-filter infrared Wesenheit magnitude, W(J,3.6), simultaneously corrects Cepheid distances for extinction and metallicity, as shown with PHOENIX model atmospheres and calibrated with Milky Way, LMC, and IC 1613 Cepheids.