The dark matter profiles in the Milky Way

The dark matter profiles in the Milky Way
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银河系中的暗物质轮廓

DOI:
10.1093/mnras/stz1698
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发表时间:
2019-06
影响因子:
4.8
通讯作者:
Li Xin
Li Xin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lin Hai Nan;Li Xin

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我们调查暗物质的银河系的轮廓使用所观察到的旋转曲线数据到100千秒差距。银河系的重子物质被分为球、盘和气体成分,每个成分都使用文献中可用的各种可能的质量分布来建模。任意组合的7个凸起的轮廓,4个磁盘的轮廓,和两个气体的轮廓结果在56重子模型。这些重子模型与四个暗物质剖面之一相结合:Burkert剖面,核心修改的剖面,伪等温剖面,NFW剖面,以拟合观测到的旋转曲线数据。结果表明,在一般情况下,NFW轮廓拟合数据比Burkert轮廓,而核心修改的轮廓和伪等温轮廓基本上被排除。最佳拟合的NFW模型的尺度为ε thr0 = 8.1 ± 0.7 kpc,对应的暗物质局域密度为ρdm(R= R ε)= 0.51 ± 0.09 GeV cm−3。
We investigate the dark matter profile of the Milky Way using the observed rotation curve data out to 100 kpc. The baryonic matter of the Milky Way is divided into bulge, disc, and gas components, and each component is modelled using various possible mass profiles available in literature. The arbitrary combination of seven bulge profiles, four disc profiles, and two gas profiles results in 56 baryon models. These baryon models are combined with one of the four dark matter profiles: Burkert profile, core-modified profile, pseudo-isothermal profile, and NFW profile, to fit the observed rotation curve data. Results show that in general the NFW profile fits the data better than the Burkert profile, while the core-modified profile and the pseudo-isothermal profile are essentially ruled out. The best-fitting NFW model has the scale lengthr0= 8.1 ± 0.7 kpc, and the corresponding local density of dark matter is ρdm(R= R⊙) = 0.51 ± 0.09 GeV cm−3.
时空各向异性对星系旋转曲线的影响
DOI: 10.1140/epjc/s10052-013-2447-1
发表时间: 2013-05
影响因子: 4.4
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DOI: 10.1086/151562
发表时间: 1972
期刊: The Astrophysical Journal
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