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On the Luminosity Distance and the Hubble Constant (Revised)

Yuri Heymann

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Abstract

By differentiating the standard formula for the luminosity distance with respect to time, we find that the equation is inconsistent with light propagation. Therefore, a new defnition of the luminosity distance is provided for an expanding Universe. From supernovae observations, using this defnition we find that the Hubble parameter is a constant of physics equal to Ho = 63.2 km/s/Mpc.

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What this paper is about

By differentiating the standard formula for the luminosity distance with respect to time, we find that the equation is inconsistent with light propagation. Therefore, a new defnition of the luminosity distance is provided for an expanding Universe. From supernovae observations, using this defnition we find that the Hubble parameter is a constant of physics equal to Ho = 63.2 km/s/Mpc.

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Available abstract

By differentiating the standard formula for the luminosity distance with respect to time, we find that the equation is inconsistent with light propagation. Therefore, a new defnition of the luminosity distance is provided for an expanding Universe. From supernovae observations, using this defnition we find that the Hubble parameter is a constant of physics equal to Ho = 63.2 km/s/Mpc.

Key concepts: Hubble's law, Luminosity distance, Physics, Luminosity, Cosmic distance ladder, Constant (computer programming), Supernova, Astrophysics

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