R-process enrichment in the early universe by the common envelope jets supernova r-process scenario

We study r-process enrichment of dwarf galaxies in the early universe due to the common envelope jets supernova (CEJSN) r-process scenario, where a neutron star (NS) launches jets as it collides with the core of a giant star. We compare its characteristics to the neutron NS-NS merger r-process scenario and the collapsar r-process scenario, and find that the CEJSNe exhibit several advantages over the other r-process sites in favor of heavy r-process production. The CEJSN r-process scenario can account for very early r-process nucleosynthesis, it can explain the large spread in r-process enrichment without correlation with iron, and it can pollute dwarf galaxies with r-process elements. We also consider for the first time a scenario in which a black hole replaces the NS.