[1401.3025] Exclusion of the remaining mass window for primordial black holes as the dominant constituent of dark matter

[1401.3025] Exclusion of the remaining mass window for primordial black holes as the dominant constituent of dark matter:



"In a close encounter with a neutron star, a primordial black hole can get gravitationally captured by depositing a considerable amount of energy into nonradial stellar modes. Within a short time, the black hole is trapped inside the star and disrupts it by rapid accretion. We find that the existence of old neutron stars in regions where the dark-matter density rho_{DM}>10^2 sigma/(km/s) GeV/cm^3 (where sigma is the dark-matter velocity dispersion) limits the abundance of primordial black holes in the mass range 10^{17} g < m_{PBH} < 10^{24} g, which was previously unconstrained. In combination with existing limits, our results suggest that primordial black holes cannot be the dominant dark matter constituent."



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