The Implications of Ultra-Faint Dwarf Galaxy Reticulum II on the Common Envelope Jets Supernova r-process Scenario

TL;DR

This paper demonstrates that the common envelope jets supernova (CEJSN) r-process scenario aligns with recent observations of r-process element enhancements in the ultra faint dwarf galaxy Reticulum II, suggesting it contributes significantly to r-process nucleosynthesis.

Contribution

The study shows the compatibility of the CEJSN r-process scenario with new observational data from Reticulum II, highlighting efficient mixing of r-process elements in the galaxy.

Findings

CEJSN r-process scenario is compatible with Reticulum II observations.

Efficient mixing of r-process elements in the galaxy.

CEJSN contributes significantly to r-process element production.

Abstract

We show that the common envelope jets supernova (CEJSN) r-process scenario is compatible with very recent observationally determined properties of the stars in the ultra faint dwarf (UFD) galaxy Reticulum II that are strongly enhanced in r-process elements. These new results, like efficient mixing of the r-process elements in the Reticulum II galaxy, have some implications on the CEJSN r-process scenario for UFD galaxies. In particular, the energetic jets efficiently mix with the common envelope ejecta and then with the entire interstellar medium of Reticulum II. The compatibility that we find between the scenario and new observations suggests that the CEJSN r-process scenario supplies a non-negligible fraction of the r-process elements.