The Formation and Evolution of First Dark Matter Microhalos

被引：0

作者：

Ishiyama, Tomoaki ^{[1
]}

Makino, Junichiro ^{[2
]}

Ebisuzaki, Toshikazu ^{[3
]}

机构：

[1] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 305, Japan

[2] Tokyo Inst Technol, Grad Sch Sci & Engn, Tokyo, Japan

[3] RIKEN, Saitama, Japan

来源：

FIRST STARS IV - FROM HAYASHI TO THE FUTURE | 2012年 / 1480卷

关键词：

cosmology: theory; methods: numerical; Galaxy: structure; dark matter;

D O I：

10.1063/1.4754394

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The smallest dark matter microhalos are the first structures formed in the Universe. We present the results of high-resolution simulations of the formation and evolution of first dark matter microhalos. We found that the central density cusps of microhalos are the form rho proportional to r(-1.5), steeper than the cusps of larger dark halos. Their central regions are not disrupted by tidal forces from the parent galaxies and stars. The annihilation signals from nearest microhalos could be observed as gamma-ray point-sources (radius less than 1'), with unusually large proper motions of similar to 0.2 degree per year.

引用

页码：382 / 384

页数：3

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