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BDM dark matter: CDM with a core profile and a free streaming scale

机译：BDM暗物质：具有核心配置文件和免费流媒体规模的CDM

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摘要

We present a new dark matter model BDM which is an hybrid between hot dark matter HDM and cold dark matter CDM, in which the BDM particles behave as HDM above the energy scale E-c and as CDM below this scale Evolution of structure formation is similar to that of CDM model but BDM predicts a nonvanishing free streaming lambda(fs) scale and a inner galaxy Core radius r(core), both quantities determined in terms of a single parameter E-c, which corresponds to the phase transition energy scale of the subjacent elementary particle model For energies above E-c or for a scale factor a smaller then a,, with a < a(c) < a(eq), the particles are massless and rho redshifts as radiation However, once the energy becomes E <= E-c or a > a(c) then the BDM particles acquire a large mass through a non-perturbative mechanism, as baryons do, and rho redshifts as matter with the particles having a vanishing velocity Typical energies are E-c = O(10-100) eV giving lambda(fs) alpha E-c(-4/3) less than or similar to Mpc and M-fs alpha E-c(-4) 10(9)MO A lambda(fs) not equal 0, r(core) not equal 0 help to resolve some of the short-comings of CDM such as over-abundance substructure in CDM halos and numerical fit to rotation curves in dwarf spheroidal and LSB galaxies Finally, our BDM model and the phase transition scale E-c can be derived from particle physics.
机译：我们提出了一种新的暗物质模型BDM，它是热暗物质HDM和冷暗物质CDM的混合体，其中BDM颗粒在能量尺度Ec以上时表现为HDM，而在能量尺度Ec以下则表现为CDM。 CDM模型的模型，但BDM预测无消失的自由流lambda（fs）尺度和内部星系Core半径r（core），这两个数量都是根据单个参数Ec来确定的，该参数对应于下层基本粒子的相变能级模型对于大于Ec的能量或小于a的比例因子，当a a（c），则BDM粒子通过重扰动机制获得大质量，如重子那样，并且随着粒子的消失，rho随物质红移而移动。典型的能量为Ec = O（10-100）eV，给出λ （fs）小于或等于alpha Ec（-4/3）类似于Mpc和M-fs alpha Ec（-4）10（9）MO lambda（fs）不等于0，r（core）不等于0帮助解决CDM的某些缺点，例如过剩CDM光晕中的子结构和矮球状和LSB星系中旋转曲线的数值拟合最后，我们的BDM模型和相变尺度Ec可以从粒子物理学中得出。

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