What is the (dark) matter with dwarf galaxies
What is the (dark) matter with dwarf galaxies
复制标题
矮星系的（暗）物质是什么
DOI：
10.1111/j.1365-2966.2010.18163.x
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发表时间：
2010
影响因子：
4.8
通讯作者：
S. White
中科院分区：
文献类型：
--
作者：
Till Sawala;Q. Guo;C. Scannapieco;A. Jenkins;S. White
We present cosmological hydrodynamical simulations of the formation of dwarf galax- ies in a representative sample of haloes extracted from the Millennium-II Simulation. Our six haloes have a z = 0 mass of � 10 10 Mand show different mass assembly histories which are reflected in different star formation histories. We find final stellar masses in the range 5 × 10 7 10 8 M� , consistent with other published simulations of galaxy formation in similar mass haloes. Our final objects have structures and stellar populations consistent with observed dwarf galaxies. However, in aCDM universe, 10 10 Mhaloes must typically contain galaxies with much lower stellar mass than our simulated objects if they are to match observed galaxy abundances. The dwarf galaxies formed in our own and all other current hydrodynamical simulations are more than an order of magnitude more luminous than expected for haloes of this mass. We discuss the significance and possible implications of this result.
DOI：
10.1088/2041-8205/712/1/l103
发表时间：
2010-02
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
V. Belokurov;M. Walker;N. Evans;G. Gilmore;M. Irwin;D. Just;Sergey E. Koposov;M. Mateo;E. Olszewski;L. Watkins;L. W. IoA;Cambridge;S. Observatory;Tucson;U. Michigan
通讯作者：
V. Belokurov;M. Walker;N. Evans;G. Gilmore;M. Irwin;D. Just;Sergey E. Koposov;M. Mateo;E. Olszewski;L. Watkins;L. W. IoA;Cambridge;S. Observatory;Tucson;U. Michigan