Using XMM-Newton to study a massive white dwarf merger

We propose a 25 ks observation of a recently discovered unique hydrogen andheliumfree hot star, Cas J005311, with a record wind velocity of 5 per cent ofthe speed of light. Cas J005311 is likely a superChandrasekhar masscarbonoxygen white dwarf which is a result of a merger. We propose a decisivedetection experiment aimed to verify the theory of magnetically supported windsfrom fast rotating supermassive white dwarfs. The XMMNewton discovery of Xraysfrom Cas J005311 will have profound consequences for our understanding of whitedwarf mergers and the origin of fastrotating and magnetic stars. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]