Reticulum II

Reticulum II was discovered in 2015 by analysing images from the Dark Energy Survey.

[1][4] It has an unusual enhancement of r-process elements, meaning that gold and europium are enriched in the brightest stars in the galaxy.

[2] The implication of the unusual enrichment in elements heavier than zinc, is that the r-process is very rare, and only happened once in this galaxy, possibly by the collision of two neutron stars.

[6] Gamma rays mostly with energies between 2 and 10 GeV have been detected by the Fermi satellite.

[7] The radiation from Reticulum II is more significant than that of other dwarf galaxy emissions.