New Phase-coherent Measurements of Pulsar Braking Indices

Details New Phase-coherent Measurements of Pulsar Braking Indices New Phase-coherent Measurements of Pulsar Braking Indices

2007-02-07

arxiv.org/abs/astro-ph/0702196v1

Astrophys.SpaceSci.308:317-323,2007

Astronomy and Astrophysics

Astrophysics

7 pages, 5 figures. To be published in the proceedings of the conference "Isolated Neutron Stars: from the Interior to the Sur

Scientific paper

10.1007/s10509-007-9320-3

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.

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