A Braking Index for the Young, High Magnetic Field, Rotation-Powered Pulsar in Kesteven 75
作者： Margaret A. Livingstone , Victoria M. Kaspi , E. V. Gotthelf , L. Kuiper
DOI: 10.1086/505570
关键词: Index (economics) 、 Rotation 、 Physics 、 Supernova remnant 、 Magnetic field 、 Millisecond pulsar 、 Static timing analysis 、 Astronomy 、 Astrophysics 、 Pulsar 、 Magnetic dipole
摘要: We present the first phase-coherent measurement of a braking index for young, energetic rotation-powered pulsar PSR J1846-0258. This 324 ms is located at center supernova remnant Kesteven 75 and has characteristic age τc = 723 yr, spin-down energy Ė 8.3 × 1036 ergs s-1, an inferred magnetic field 4.9 1013 G. Two independent timing solutions are derived, which together span 5.5 yr data obtained with Rossi X-Ray Timing Explorer. In addition, partially analysis confirms fully result. The measured value index, n 2.65 ± 0.01, significantly less than 3, expected from dipole radiation, implying another physical process must contribute to pulsar's rotational evolution. Assuming been constant since birth, we place upper limit on J1846-0258 884 smallest estimate any pulsar.
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