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Enhancement of dark matter capture by neutron stars in binary systems

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arxiv 1111.3205 v1 pith:CCAV2NLB submitted 2011-11-14 astro-ph.CO

Enhancement of dark matter capture by neutron stars in binary systems

classification astro-ph.CO
keywords darkmatteramplificationbinarycapturecompanionsneutronparticles
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 case of the binary pulsar PSR J1906+0746 with the orbital period of 4 hours the amplification factor is 3.5. This amplification can be attributed to the energy loss by dark matter particles resulting from their gravitational scattering off moving companions.

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