双参数化动力学暗能量对中微子质量的影响  

The Impact of Two-Parametrization Dynamical Dark Energy on the Neutrino Mass

作　　者：赵欣悦 郭瑞芸 邱佳康 

机构地区：[1]西安工业大学基础学院,陕西 西安

出　　处：《天文与天体物理》2024年第3期34-43,共10页Astronomy and Astrophysics

摘　　要：中微子绝对质量的测量和暗能量本质属性的探究是宇宙学前沿的两个重要科学问题。中微子振荡现象表明中微子具有非零质量,KATRIN实验给出的最新结果mν=0.8 eV,宇宙学观测限制测出中微子质量总和的上限为∑mv≤0.1 eV。本文联合不同的主流观测数据,包括宇宙微波背景辐射数据、重子声学振荡数据以及Ia型超新星数据,探究两种双参数化动力学暗能量模型中中微子质量的拟合情况。这两种参数化分别为对数形式参数化和振荡形式参数化。相较于Chevallier-Polarski-Linder参数化,它们可以克服状态方程的演化发散问题(z→−1),成功探测暗能量在全宇宙中的演化。我们发现对数形式参数化和振荡形式参数化暗能量增大了中微子质量和的拟合值上限,且扩大限制宇宙学模型的观测数据样本可以压低中微子质量拟合值的上限。The measurement of the absolute mass of neutrinos and the investigation of the intrinsic properties of dark energy are two important scientific issues at the forefront of cosmology. The neutrino oscillation phenomenon shows that neutrinos have non-zero mass, and the latest results given by the KATRIN experimentmν=0.8 eV, the upper limit of the cosmological observational limit on the total of measured neutrino masses is∑mv≤0.1 eV. In this paper, we combine different mainstream observational data, including cosmic microwave background radiation data, baryon acoustic oscillation data, and type Ia supernova data, to explore the fit of neutrino masses in two kinds two parametrizations dynamical dark energy models. These two parameterizations are the logarithmic parameterization and the oscillatory parameterization, respectively. Compared to the Chevallier-Polarski-Linder parameterization, they can overcome the evolutionary divergence problem of the equation of state (z→−1) and successfully probe the evolution of dark energy in the whole universe. We find that the logarithmic parameterization and the oscillatory parameterization of the dark energy increase the upper limit of the fitted values of the total of neutrino mass and that expanding the sample of observational data limiting the cosmological model depresses the upper limit of the fitted values of the neutrino mass.

关 键 词：对数形式参数化 振荡形式参数化 动力学暗能量 中微子质量 观测限制 

分 类 号：O57[理学—粒子物理与原子核物理]