Resolving the Soft X-Ray Ultrafast Outflow in PDS 456

JR acknowledges financial support through grants 80NSSC18K1603 and HST-GO-14477. VB acknowledges support from grant number GO7-18091X. VB and JR both acknowledge support from grant 80NSSC20K0793. EN acknowledges financial contribution from the agreement ASI-INAF n.2017-14-H.0 and partial support from the EU Horizon 2020 Marie Sklodowska-Curie grant agreement no.664931 FH acknowledges support from the Hubble Space Telescope guest observer program HST-GO-15309. Based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA.