The intriguing outcomes of double degenerate mergers

This review talk explores the diverse outcomes of white dwarf mergers, emphasising that not all double degenerate mergers result in supernovae. Possible outcomes include the formation of a more massive WD, partial explosions that leave behind unusual remnants, and merger-induced collapse leading to the formation of rapidly spinning neutron stars or magnetars. Additionally, merging WDs have been proposed as potential progenitors for long gamma-ray bursts and Fast Radio Bursts.