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New phase-coherent measurements of pulsar braking indices |
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| Authors: | Margaret A Livingstone Victoria M Kaspi Fotis P Gavriil Richard N Manchester E V G Gotthelf Lucien Kuiper |
| Affiliation: | (1) Physics Department, McGill University, Rutherford Physics Building, 3600 University Street, Montreal, Qc, H3A 2T8, Canada;(2) NASA Goddard Space Flight Center Code 662, X-ray Astrophysics Laboratory, Greenbelt, MD 20771, USA;(3) Australia National Telescope Facility, CSIRO, P.O. Box 76, Epping, NSW, 1710, Australia;(4) Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027-6601, USA;(5) Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, Netherlands |
| Abstract: | Pulsar braking indices offer insight into the physics that underlies pulsar spin-down. Only five braking indices have been measured via phase-coherent timing; all measured values are less than 3, the value expected from magnetic dipole radiation. Here we present new measurements for three of the five pulsar braking indices, obtained with phase-coherent timing for PSRs J1846-0258 (n=2.65±0.01), B1509-58 (n=2.839±0.001) and B0540-69 (n=2.140±0.009). We discuss the implications of these results and possible physical explanations for them. |
| Keywords: | Pulsars Timing |
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