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Fig. 2

image

Main stages of the evolution of the binary system leading to the currently observed PSR J0751+1807, accompanied by a 0.12 M WD (detailed description in Sect. 2.2). A – main sequence stage; B – common envelope stage (secondary inside the primary); C – the primary becoming a He star; D – core-collapse supernova explosion of the primary; E – Roche lobe filling of the secondary and its strong mass loss, LMXB and recycling stage; F – current state: compact binary MSP+WD.

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