Gaia white dwarfs within 40 pc II: the volume-limited Northern hemisphere sample. - McCleery, Jack; Tremblay, Pier-Emmanuel; Gentile Fusillo, Nicola Pietro; Hollands, Mark A; Gänsicke, Boris T; Izquierdo, Paula; Toonen, Silvia; Cunningham, Tim; Rebassa-Mansergas, Alberto (Monthly Notices of the Royal Astronomical Society, 2020)