Why are millisecond pulsar magnetic fields low and how do their X-rays arisequestionMark

Binary millisecond pulsars (MSPs) found in the field are thought to be.recycled. from accreting pulsars. These MSPs have short periods, low spindownrates (Pdot) and consequently low surface magnetic fields (Bs) as Bs isproportional to (Pdot P)^0.5. It is unclear, however, how the MSP surfacemagnetic field can evolve from the high fields observed in pulsars to the lowMSP values. Two models have been proposed to explain this. Also, the origin ofthe high energy emission is unclear as too few MSP Xray observations have beenmade to differentiate between competing models. With these XMMNewtonobservations of four MSPs previously unobserved in Xrays, we will discriminatebetween differing models describing the magnetic field evolution and the high energy emission origin. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]