The Anomalous Acceleration of PSR J2043+1711: Long-Period Orbital Companion or Stellar Flyby?

Based on the rate of change of its orbital period, PSR J2043+1711 has a substantial peculiar acceleration of 3.5 \pm 0.8 mm/s/yr, which deviates from the acceleration predicted by equilibrium Milky Way models at a 4\sigma level. The magnitude of the peculiar acceleration is too large to be explained by... Show more