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We present a spectroscopic analysis of an extremely rapidly rotating lateO-type star, VFTS102, observed during a spectroscopic survey of 30 Doradus.VFTS102 has a projected rotational velocity larger than 500\kms\ and probablyas large as 600\kms; as such it would appear to be the most rapidly rotatingmassive star currently identified. Its radial velocity differs by 40\kms\ fromthe mean for 30 Doradus, suggesting that it is a runaway. VFTS102 lies 12 pcsfrom the X-ray pulsar PSR J0537-6910 in the tail of its X-ray diffuse emission.We suggest that these objects originated from a binary system with therotational and radial velocities of VFTS102 resulting from mass transfer fromthe progenitor of PSR J0537-691 and the supernova explosion respectively.

The VLT-FLAMES Tarantula Survey: The fastest rotating O-type star and shortest period LMC pulsar - remnants of a supernova disrupted binary?