We report the discovery of two young isolated radio pulsars with very high inferred magnetic fields. PSR J1119-6127 has period P = 0.407 s, and the largest period derivative known among radio pulsars, = 4.0 × 10-12. Under standard assumptions these parameters imply a characteristic spin-down age of only τc = 1.6 kyr and a surface dipole magnetic field strength of B = 4.1 × 1013 G. We have measured a stationary period second derivative for this pulsar, resulting in a braking index of n = 2.91 ± 0.05. We have also observed a glitch in the rotation of the pulsar, with fractional period change ΔP/P = -4.4 ×10-9. Archival radio imaging data suggest the presence of a previously uncataloged supernova remnant centered on the pulsar. The second pulsar, PSR J1814-1744, has P = 3.975 s and = 7.4 × 10-13. These parameters imply τc = 85 kyr, and B = 5.5 ×1013 G, the largest of any known radio pulsar.
Both PSR J1119-6127 and PSR J1814-1744 show apparently normal radio emission in a regime of magnetic field strength where some models predict that no emission should occur. Also, PSR J1814-1744 has spin parameters similar to the anomalous X-ray pulsar (AXP) 1E 2259+586, but shows no discernible X-ray emission. If AXPs are isolated, high magnetic field neutron stars ("magnetars"), these results suggest that their unusual attributes are unlikely to be merely a consequence of their very high inferred magnetic fields.
"Discovery of Two High Magnetic Field Radio Pulsars" F. Camilo, V. M. Kaspi, A. G. Lyne, R. N. Manchester, J. F. Bell, N. D'Amico, N. P. F. McKay, & F. Crawford, Astrophysical Journal, 541, 367 (2000).