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- W2801909691 endingPage "5452" @default.
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- W2801909691 abstract "Self-interacting dark matter provides a promising alternative for the cold dark matter paradigm to solve potential small-scale galaxy formation problems. Nearly all self-interacting dark matter simulations so far have considered only elastic collisions. Here we present simulations of a galactic halo within a generic inelastic model using a novel numerical implementation in the arepo code to study arbitrary multistate inelastic dark matter scenarios. For this model we find that inelastic self-interactions can: (i) create larger subhalo density cores compared to elastic models for the same cross-section normalization; (ii) lower the abundance of satellites without the need for a power spectrum cut-off; (iii) reduce the total halo mass by about |$10{{ rm per cent}}$|; (iv) inject the energy equivalent of |$mathcal {O}(100)$| million Type II supernovae in galactic haloes through level de-excitation; (v) avoid the gravothermal catastrophe due to removal of particles from halo centres. We conclude that a ∼5 times larger elastic cross-section is required to achieve the same central density reduction as the inelastic model. This implies that well-established constraints on self-interacting cross-sections have to be revised if inelastic collisions are the dominant mode. In this case significantly smaller cross-sections can achieve the same core density reduction thereby increasing the parameter space of allowed models considerably." @default.
- W2801909691 created "2018-05-17" @default.
- W2801909691 creator A5005759342 @default.
- W2801909691 creator A5043394386 @default.
- W2801909691 creator A5047206136 @default.
- W2801909691 creator A5057537951 @default.
- W2801909691 date "2019-02-06" @default.
- W2801909691 modified "2023-10-13" @default.
- W2801909691 title "Evaporating the Milky Way halo and its satellites with inelastic self-interacting dark matter" @default.
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