EVR-CB-001: An evolving, progenitor, white dwarf compact binary discovered with the Evryscope

Jeffrey K. Ratzloff, Brad N. Barlow, Thomas Kupfer +7

We present EVR-CB-001, the discovery of a compact binary with an extremely low mass ($.21\pm 0.05M_{\odot }$) helium core white dwarf progenitor (pre-He WD) and an unseen low mass…