Title: The case of 1.5 eV neutrino hot dark matter Show Chinese title

Title: 1.5 eV中微子热暗物质的情形

Abstract: The lensing data of the galaxy cluster Abell 1689 can be explained by an isothermal fermion model with a mass of 1-2 eV. The best candidate is the 1.5 eV neutrino; its mass will be searched down to 0.2 eV in KATRIN 2015. If its righthanded (sterile) modes were created too, there is 20% neutrino hot dark matter. Their condensation on clusters explains the reionization of the intercluster gas without Pop. III stars. Baryonic structure formation is achieved by gravitional hydrodynamics alone, without dark matter trigger. Show Chinese abstract

Abstract: 阿贝尔 1689 星系团的透镜数据可以用一个 1-2 eV 的等温费米子模型来解释。 最有可能的候选者是 1.5 eV 的中微子；其质量将在 2015 年的 KATRIN 实验中被探测到低至 0.2 eV。 如果它的右手（无相互作用）模式也被创造出来，那么有 20% 的中微子冷暗物质。 它们在星团中的凝聚可以解释星团间气体的再电离，而无需 Pop III 星。 重子结构的形成仅通过引力流体力学实现，不需要暗物质触发。