On the implication of the recently discovered 5 millisecond binary pulsar PSR 1855+09

Abstract

We argue that the extraordinary fact that all three known millisecond pulsars are very close to the galactic plane implies that there must be ~100 potentially observable millisecond pulsars within ~ 4 kpc from the Sun. Our other main conclusion is that the dipole magnetic fields of old neutron stars probably saturate around 5 x l0^8 gauss.