Concerning SH0ES data: discrepant W0, VI absolute magnitudes for Cepheids in the keystone galaxy NGC4258

ABSTRACT

SH0ES VI-band photometry for classical Cepheids in the keystone galaxy NGC4258 yield discrepant absolute magnitudes. Specifically, the 2016 and 2022 published SH0ES Cepheid data for NGC4258 exhibit a substantial offset of ΔW0, VI ≃ 0m.3. That adds to a suite of existing concerns associated with the SH0ES analysis, which in sum imply that their relatively non-changing Hubble constant for nearly 20 years warrants scrutiny.