论文标题
非标准宇宙学中暗物质困扰的哈勃常数
The Hubble Constant Troubled by Dark Matter in Non-Standard Cosmologies
论文作者
论文摘要
标准的宇宙学模型通过假设一个以平坦几何形状中的宇宙常数和暗物质为主的宇宙，在复制观察数据方面取得了巨大的成功。但是，基于局部测量值的几项研究表明，宇宙与宇宙微波背景的分歧太快。考虑到来自CMB，Baryon声学振荡和IA Supernovae型的组合数据，我们表明，如果生产暗物质颗粒的生产背后的机制至少具有很小的非热起源，则可以在$λ$ CDM中诱导较大的Hubble速率$ H_0 $的值，以减轻$λ$ CDM的麻烦。但是，在存在非标准宇宙学的情况下，我们可以完全调和CMB和本地测量结果，并达到$ H_0 = 70-74 \，{\ rm km s^{ - 1} mpc^{ - 1}}} $。
The Standard Cosmological Model has experienced tremendous success at reproducing observational data by assuming a universe dominated by a cosmological constant and dark matter in a flat geometry. However, several studies, based on local measurements, indicate that the universe is expanding too fast, in disagreement with the Cosmic Microwave Background. Taking into account combined data from CMB, Baryon Acoustic Oscillation, and type Ia Supernovae, we show that if the mechanism behind the production of dark matter particles has at least a small non-thermal origin, one can induce larger values of the Hubble rate $H_0$, within the $Λ$CDM, to alleviate the trouble with $H_0$. In the presence of non-standard cosmology, however, we can fully reconcile CMB and local measurements and reach $H_0=70-74\, {\rm km s^{-1} Mpc^{-1}}$.
