论文标题
大量中微子的扩展暗能量模型的含义
Implications of an extended dark energy model with massive neutrinos
论文作者
论文摘要
最近，有报道称，使用ACT和SPTPOL数据时，在中微子质量参数（$σm_ν$）上找到了下中微子质量参数（$σm_ν$），但是在大多数情况下，在1 $σ$级别的情况下，$σm_ν$上的这些界限仍然较弱。在这种情况下，在这项工作中，我们研究了在中微子质量参数以及哈勃和S8张力上使用扩大的四个参数动态暗能量方程的后果。状态的四个参数暗能方程结合了状态暗能量方程的通用非线性单调演变，其中四个参数是状态方程的早期和现值，过渡量表因子和过渡的锐度。我们报告说，使用镜头划分的planck + bao +万神殿，并以绝对级别的$ m_b $和儿童/viking $ s_8 $ prior，该模型偏爱中性质量参数的非零值，最多，$ \ sim 1σ$ fepper $ \ sim fepp（$ fepper） EV）。在这种情况下，此模型还将哈勃张力降低到$ \ sim2.5σ$级别，而s8张力至$ \ sim $ \ sim $ 1.5 $σ$级别。该模型还对状态的深色能量方程的价值提供了更严格的约束，目前$ w_0 $（$ w_0 = -0.9901 _ { - 0.0766}^{+0.0561} $）与cpl一样的参数化。
Recently there has been reports of finding a lower bound on the neutrino mass parameter ($Σm_ν$) when using ACT and SPTpol data however these bounds on the $Σm_ν$ are still weaker for most case around at 1 $σ$ level. In this context, here in this work, we study the consequences of using an enlarged four parameter dynamical dark energy equation of state on neutrino mass parameter as well as on the Hubble and S8 tensions. The four parameter dark energy equation of state incorporates a generic non-linear monotonic evolution of the dark energy equation of state, where the four parameters are the early and the present value of the equation of state, the transition scale factor and the sharpness of the transition. We report that with lensing-marginalized Planck + BAO + Pantheon and prior on absolute magnitude $M_B$ and KIDS/Viking $S_8$ prior, the model favours a non-zero value for the neutrino mass parameter at the most at $\sim 1 σ$ level ($Σm_ν= 0.1847_{-0.165}^{+0.0698}$ eV). In this case this model also brings down the Hubble tension to $\sim 2.5 σ$ level and the S8 tension to $\sim$ 1.5 $σ$ level. This model also provide a tighter constraints on the value of the dark energy equation of state at present epoch $w_0$ ($w_0 = -0.9901_{-0.0766}^{+0.0561}$) in comparison to the CPL like parameterization.
