Orbital Decay in a 20 Minute Orbital Period Detached Binary with a Hydrogen-poor Low-mass White Dwarf

Kevin B. Burdge, Jim Fuller, E. Sterl Phinney, Jan Van Roestel, Antonio Claret, Elena Cukanovaite, Nicola Pietro Gentile Fusillo, Michael W. Coughlin, David L. Kaplan, Thomas Kupfer, Pier Emmanuel Tremblay, Richard G. Dekany, Dmitry A. Duev, Michael Feeney, Reed Riddle, S. R. Kulkarni, Thomas A. Prince