  Neutron matter at densities somewhat above nuclear densities is believed to
be superfluid due to the condensation of neutron pairs in the 3 P2 channel.
This condensate breaks rotational symmetry spontaneously and leads to the
existence of Goldstone bosons (angulons). We show that the coupling to magnetic
fields mediated by the magnetic moment of the neutron makes angulons massive
and capable of decaying into a neutrino-antineutrino pair. We compute the rate
for this process and argue they become competitive with other cooling processes
for temperatures around 10^7 K as long as the interior magnetic field of the
star is in the B=10^15 G range or above.
