用简化的相对论气体模型检验暗物质的温度和数量
Testing dark matter warmness and quantity via the reduced relativistic gas model
摘要：
我们使用最近提出的约化相对论气体（RRG）模型的框架来获得暗物质和暗能量（在本例中，宇宙学常数）的$Ω$的界限，考虑到暗物质的任意温度。萨哈罗夫曾用一个等价的状态方程来预测物质功率谱中的振荡。两种类型的测试占在下面，即来自动力学的共形因子的均匀和各向同性度规，也是基于线性宇宙扰动的。RRG模型证明了其高效率，允许以相当经济的方式在所述参数的空间中探索大体积。综合Ia型超新星（Union 2样品）、$H(z)$、CMB（$R$因子）、BAO和LSS（2dfGRS数据）的检验结果，我们确认$\La$ CDM是最有利的模型。与此同时，仅对于2dfGRS数据，我们发现具有非常少量的暗物质的替代模型也是可行的。考虑到LSS是唯一不受低能引力作用的可能量子贡献影响的测试，这个输出可能是相关的。
英文摘要：
We use the framework of a recently proposed model of reduced relativistic gas (RRG) to obtain the bounds for $Ω$'s of Dark Matter and Dark Energy (in the present case, a cosmological constant), taking into consideration an arbitrary warmness of Dark Matter. An equivalent equation of state has been used by Sakharov to predict the oscillations in the matter power spectrum. Two kind of tests are accounted for in what follows, namely the ones coming from the dynamics of the conformal factor of the homogeneous and isotropic metric and also the ones based on linear cosmic perturbations. The RRG model demonstrated its high effectiveness, permitting to explore a large volume in the space of mentioned parameters in a rather economic way. Taking together the results of such tests as Supernova type Ia (Union2 sample), $H(z)$, CMB ($R$ factor), BAO and LSS (2dfGRS data), we confirm that $\La$CDM is the most favored model. At the same time, for the 2dfGRS data alone we found that an alternative model with a very small quantity of a Dark Matter is also viable. This output is potentially relevant in view of the fact that the LSS is the only test which can not be affected by the possible quantum contributions to the low-energy gravitational action.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
