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- W2016090103 abstract "Protons gain energy in short range collisions with heavier dark matter particles (DMPs) of comparable velocity dispersion. We examine the conditions under which the heating of baryons by scattering off DMPs can offset radiative cooling in the cores of galaxy clusters. Collisions with a constant cross section independent of the relative velocity of the colliding particles, cannot produce stable thermal balance. In this case, avoiding an unrealistic increase of the central temperatures yields the upper bound on the cross-section, sigma_xp<10^-25 cm^2 (m_x/m_p), where m_x and m_p are the DMP and proton mass, respectively. A stable balance, however, can be achieved for a power law dependence on the relative velocity, V, of the form sigma_xp propto V^a with a<-3. An advantage of this heating mechanism is that it preserves the metal gradients observed in clusters." @default.
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- W2016090103 date "2006-07-10" @default.
- W2016090103 modified "2023-10-16" @default.
- W2016090103 title "Consequences of Short‐Range Interactions between Dark Matter and Protons in Galaxy Clusters" @default.
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- W2016090103 doi "https://doi.org/10.1086/504505" @default.
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