In a black widow (BW), the companion is less than 0.1 stellar masses. In a redblack, the companion is between 0.1 and 0.7 stellar masses. Spider pulsars are different from other pulsar binaries ...

The "black widow" pulsar PSR J0610-2100 and the "redback" pulsar PSR J2043+1711 both display significant accelerations, though their origins are likely natural. While the idea of star-steering ...