Abstract:Type-Ia supernovae (SN Ia) are powerful stellar explosions that provide important distance indicators in cosmology. There is significant tension between values of the Hubble constant (expansion rate of the universe) determined from SN Ia and from other data. Recently, we proposed a new SN Ia mechanism that involves a nuclear fission chain reaction in an isolated white dwarf [PRL 126, 1311010]. We find the average mass of an exploding star decreases with increasing enrichment f 5 -the fraction of uranium that i… Show more
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