The Top 12 of 2012
6. Dark Matter Haloes: Now, Theoretically More Concentrated!
Why it is important: The universe underwent major changes to get from a few fluctuations in the CMB to the structure of galaxy clusters and dark matter filaments we observe today. Studying how the structure of dark matter haloes evolved with redshift is one way to figure out how these changes happened.
- This paper presents new models of dark matter halo structure that are a significantly better match to observations (such as those described in #8). On the y-axis, the concentration of dark matter haloes (how much of their mass is squeezed into the center of the halo relative to the outskirts) are compared to the mass of the halo within the virial radius on the x-axis. The models presented in this paper (solid line) no longer underpredict observed halo concentrations (error bars), as was the case for previous models (dotted line). (Figure 13 of Prada et al.)
Next: (#5) The Satellites Are Still Missing… Where are the Milky Way’s Predicted Massive Dwarf Galaxies?
Previous: (#7) Putting a New Spin on Stellar Models: A New Treatment of Mass Loss and Rotation for Stellar Evolution
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