An Adjustment of the Apparent Luminosity of Standard Candles for the 'De-boosting' Effect

“De-boosting” is a well-known relativistic effect that alters the apparent luminosity of radiation sources with the non-zero redshift parameter z. It exists in both Special Relativity and General Relativity frameworks and is proportional to (z+1)^(-2). While the “boosting” (for blueshift) and “de-boosting” (for redshift) of light sources has been successfully accounted for and observed in research of various astronomical objects, it was ignored in the establishment of Standard candles for cosmological distances. A Standard candle adjustment appears necessary for “de-boosting” for high z, otherwise we would incorrectly assume that Standard candles appear dimmer, not because of “de-boosting” but because of the excessive distance, which would affect the entire Standard candles ladder at cosmological distances. The “de-boosting” correction of the apparent luminosities of SNIa places the effective rest-frame magnitudes below the curve corresponding to the cosmological model with the parameters Λ=0 and (ΩM, ΩΛ) = (2, 0) on the Hubble diagram. This way, the “de-boosting” correction of the apparent luminosities of SNIa may further adjust and clarify cosmological models.