title: Enhancement of dark matter capture by neutron stars in binary systems.
abstract: We study the capture of dark matter particles by neutron stars in close binary systems. By performing a direct numerical simulation, we find that there is a sizable amplification of the rate of dark matter capture by each of the companions. In the case of the binary pulsar PSR J1906+0746 with the orbital period of 4 hours the amplification factor is approximately equal to 3.5. This amplification can be attributed to the energy loss by dark matter particles resulting from their gravitational scattering off moving companions.
authors.affiliation: Service de Physique Théorique, Université Libre de Bruxelles, 1050 Brussels, Belgium. lbrayeur@vub.ac.be
authors.forename: Lionel
authors.initials: L
authors.lastname: Brayeur
authors.forename: Peter
authors.initials: P
authors.lastname: Tinyakov