Self-interacting warm dark matter
- NORDITA, Blegdamsvej 17, DK-2100 Copenhagen, (Denmark)
- Department of Physics and Department of Astronomy, Ohio State University, Columbus, Ohio 43210 (United States)
It has been shown by many independent studies that the cold dark matter scenario produces singular galactic dark halos, in strong contrast with observations. Possible remedies are that either the dark matter is warm so that it has significant thermal motion or that the dark matter has strong self-interactions. We combine these ideas to calculate the linear mass power spectrum and the spectrum of cosmic microwave background (CMB) fluctuations for self-interacting warm dark matter. Our results indicate that such models have more power on small scales than is the case for the standard warm dark matter model, with a CMB fluctuation spectrum which is nearly indistinguishable from standard cold dark matter. This enhanced small-scale power may provide better agreement with the observations than does standard warm dark matter. (c) 2000 The American Physical Society.
- OSTI ID:
- 20217388
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 62, Issue 4; Other Information: PBD: 15 Aug 2000; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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