Towards a paradigm change in the main heavy r-process nucleosynthesis
  sites
  We study the basic properties of three possible r-process scenarios (sites)
and compare them to recent observations and theoretical simulations. We find
that the common envelope jets supernova (CEJSN) r-process scenario can account
for the different observations of r-process nucleosynthesis, including the
presence of r-process-rich low-metalicity stars in ultra-faint dwarf (UFD)
galaxies. The neutron star (NS)-NS merger scenario and the collapsar scenario
encounter some difficulties. Despite that, we conclude that it is very likely
that more than one r-process scenario exists, with a significant contribution
by the CEJSN r-process scenario. We give a prescription to include this
scenario in population synthesis studies of the r-process.
