Type Ia supernovae: Non-standard candles of the universe

被引：0
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作者：
A. I. Bogomazov
A. V. Tutukov
机构：
[1] Moscow State University,Sternberg Astronomical Institute
[2] Russian Academy of Sciences,Institute of Astronomy
来源：
Astronomy Reports | 2011年 / 55卷
关键词：
Dust; Dark Energy; Star Formation; Astronomy Report; Dust Absorption;
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摘要：
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.
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