| Abstract: | We analyze the influence of the evolution of light absorption by gray dust in the host galaxies of type Ia supernovae (SN
Ia) and the evolution of the mean combined mass of close-binary carbon-oxygen white dwarfs merging due to gravitational waves
(SN Ia precursors) on the interpretation of Hubble diagrams for SN Ia. A significant increase in the mean SN Ia energy due
to the higher combined masses of merging dwarfs should be observable at redshifts z > 2. The observed relation between the distance moduli and redshifts of SN Ia can be interpreted not only as evidence for
accelerated expansion of the Universe, but also as indicating time variations of the gray-dust absorption of light from these
supernovae in various types of host galaxies, observational selection effects, and the decreasing mean combined masses of
merging degenerate dwarfs. |
