Habitability of neutron star systems

[1] Of the roughly 3000 neutron stars known, only a handful have sub-stellar companions.

Pulsars do not emit large quantities of radiation given their small size; the habitable zone can easily end up lying so close to the star that tidal effects destroy the planets.

A habitable planet orbiting a neutron star must be between one and 10 times the mass of the Earth.

Its atmosphere must also be thick enough to convert the intense X-ray radiation from the neutron star into heat on its surface allowing it to have a temperature suitable for life.

[1] A Dutch research team published an article on the subject in the journal Astronomy & Astrophysics in December 2017.