A unified solution to the small scale problems of the $\Lambda$CDM model II: introducing parent-satellite interaction
Résumé
We {\bf continue the study of the impact from} baryon physics on the small scale problems of the $\Lambda$CDM model{\bf, based on a semi-analytical model (Del Popolo, 2009). With such model, we show how the cusp/core, missing satellite (MSP), Too Big to Fail (TBTF) problems} and the angular momentum catastrophe can be reconciled with observations{\bf, adding parent-sattelite interaction. Such interaction} between dark matter (DM) and baryons through dynamical friction (DF) can {\bf sufficiently} flatten the inner cusp of the density profiles to solve the cusp/core problem. {\bf Combining, in our model, a Zolotov et al. (2012)-like correction, similarly to Brooks et al. (2013), and effects of UV heating and tidal stripping, the number of massive, luminous satellites, as seen in the Via Lactea 2 (VL2) subhaloes,} is in agreement with the numbers observed in the MW, thus resolving the MSP and TBTF problems. The model also produces {\bf a distribution of the angular spin parameter and angular momentum in agreement with observations of the dwarfs studied by van den Bosch, Burkert, \& Swaters (2001).}
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