Connection between cusp-core problem and too-big-to-fail problem in CDM model
Abstract
The standard paradigm of structure formation in the universe, the cold dark matter cosmology, contains several crucial unsolved problems such as ``cusp-core problem'' and ``too-big-to-fail problem''. To solve these problems, we study about the dynamical response of a virialized system with a central cusp to the energy feedback driven by periodic supernova feedback using collisionless N-body simulations with the Nested-Particle-Mesh code. The resonance between dark matter particles and the density wave excited by the oscillating potential plays a significant role in the cusp-core transition of dark matter halos. Furthermore, we show that the cusp-core transition with periodic supernova feedback can solve the too-big-to-fail problem.
- Publication:
-
The General Assembly of Galaxy Halos: Structure, Origin and Evolution
- Pub Date:
- August 2016
- DOI:
- Bibcode:
- 2016IAUS..317..312K
- Keywords:
-
- galaxies: dwarf;
- galaxies: evolution;
- galaxies: halos;
- galaxies: structure;
- Local Group;
- cosmology: theory;
- dark matter