Halos profiles are too steep in central parts AND this contradicts observations
Hierarchical clustering models predict hundreds of satellite galaxies AND this contradicts observations
This all has one root:
Too much power on small scales
Cut-off in the power spectrum: if it makes troubles - chop it off |
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Warm dark matter (R =0.2Mpc, 1KeV) |
Sommer-Larsen &Dolgov(99), Colin et al (99), Bode, Ostriker & Turok (00) |
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Broken scale-invariance |
Kamionkowski & Liddle (99), White & Croft (00) |
| Self-interacting dark matter: heat up the center so that it expands | Spergel & Steinhard (99), Yoshida et al (99,00), Burkert (99) |
| Annihilating Dark matter: upper limit on central density | Kaplinghat, Knox & Turner (00) |
| Fuzzy dark matter | Goodman (00) |
| Scalar field dark matter | Peebles & Vilenkin (99), Hu & Peebles (99), Peebles (00), Matos, Urena-Lopez(00) |
| Decaying Dark matter | R. Cen (99,00) |
No dark matter |
Sellwood & Kosowski (00) |
| MOND (screw the gravity) | Milgrom (...), de Blok (99) |
| Baryonic Q-balls | A.Kusenko (00) |
| Coupling of DM with HI in disks | Hoekstra, van Albada, Sancisi (00) |
| Inelastic Dark Matter | D.Smith & Weiner (00) |
Self-interacting decaying DM |
Medvedev (00), Bento et al(00) |
