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Connection between cusp-core problem and too-big-to-fail problem in CDM model

Published online by Cambridge University Press:  09 May 2016

Kazuki Kato ,
Masao Mori  and
Go Ogiya
Kazuki Kato*
Affiliation:
Faculty of Pure and Applied Sciences, University of Tsukuba
Masao Mori
Affiliation:
Faculty of Pure and Applied Sciences, University of Tsukuba Center for Computational Sciences, University of Tsukuba
Go Ogiya
Affiliation:
Ludwig-Maximilians-Universität München Max-Planck-Institut für extraterrestrische Physik
*
*email: [email protected]
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Abstract

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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.

Keywords

galaxies: dwarfgalaxies: evolutiongalaxies: halosgalaxies: structureLocal Groupcosmology: theorydark matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 312 - 313
Copyright
Copyright © International Astronomical Union 2016 

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