A Massive Neutron Star in the Globular Cluster M5

@article{Freire2008AMN,
  title={A Massive Neutron Star in the Globular Cluster M5},
  author={Paulo C. C. Freire and Alex Wolszczan and Maureen van den Berg and Jason W. T. Hessels},
  journal={The Astrophysical Journal},
  year={2008},
  volume={679},
  pages={1433 - 1442}
}
We report the results of 19 years of Arecibo timing for two pulsars in the globular cluster NGC 5904 (M5), PSR B1516+02A (M5A) and PSR B1516+02B (M5B). This has resulted in the measurement of the proper motions of these pulsars and, by extension, that of the cluster itself. M5B is a 7.95 ms pulsar in a binary system with a >0.13 M☉ companion and an orbital period of 6.86 days. In deep HST images, no optical counterpart is detected within ~2.5 σ of the position of the pulsar, implying that the… 

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  • P. Freire
  • Physics
    Proceedings of the International Astronomical Union
  • 2012
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