A HIGH BRAKING INDEX FOR A PULSAR

@article{Archibald2016AHB,
  title={A HIGH BRAKING INDEX FOR A PULSAR},
  author={Robert F. Archibald and Eric V. Gotthelf and Robert D. Ferdman and Victoria M. Kaspi and Sebastien Guillot and Fiona A. Harrison and Evan F. Keane and M J Pivovaroff and Daniel K. Stern and Shriharsh P. Tendulkar and John A. Tomsick},
  journal={The Astrophysical Journal Letters},
  year={2016},
  volume={819}
}
We present a phase-coherent timing solution for PSR J1640–4631, a young 206 ms pulsar using X-ray timing observations taken with NuSTAR. Over this timing campaign, we have measured the braking index of PSR J1640–4631 to be n = 3.15 ± 0.03. Using a series of simulations, we argue that this unusually high braking index is not due to timing noise, but is intrinsic to the pulsar's spin-down. We cannot, however, rule out contamination due to an unseen glitch recovery, although the recovery timescale… 

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