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Two populations of X-ray pulsars produced by two types of supernova

Author

Listed:
  • Christian Knigge

    (University of Southampton, School of Physics and Astronomy)

  • Malcolm J. Coe

    (University of Southampton, School of Physics and Astronomy)

  • Philipp Podsiadlowski

    (University of Oxford)

Abstract

Supernova families divided Most neutron stars are formed in either iron-core collapse supernovae or electron-capture supernovae. Until now, it has not been possible to differentiate between the neutron stars produced by these two precursors. That may change with the discovery of two distinct sub-populations of Be/X-ray binary pulsars with different characteristic spin and orbital periods, and orbital eccentricities. The two sub-populations are most likely to be associated with the two distinct types of neutron-star-forming supernovae, with electron-capture events preferentially producing short orbital and spin periods in low-eccentricity systems.

Suggested Citation

  • Christian Knigge & Malcolm J. Coe & Philipp Podsiadlowski, 2011. "Two populations of X-ray pulsars produced by two types of supernova," Nature, Nature, vol. 479(7373), pages 372-375, November.
    • Handle: RePEc:nat:nature:v:479:y:2011:i:7373:d:10.1038_nature10529
    DOI: 10.1038/nature10529
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