论文标题
从完整形状和BAO数据中的宇宙曲率和动态性暗能量的限制
Constraints on the curvature of the Universe and dynamical dark energy from the Full-shape and BAO data
论文作者
论文摘要
我们介绍了O $λ$ CDM，$ W_0 $ CDM的参数以及$ W_0 W_A $ CDM型号，从全面的Baryon声学振荡（BAO），Big Bang Bang核合成（BBN）（BBN）和Supernovae数据获得的$ W_0 W_A $ CDM型号。我们的限制完全独立于宇宙微波背景（CMB）各向异性的数据，但是与参数误差线有关的CMB约束匹配。我们发现空间曲率与平坦的宇宙$ω_k= -0.043 _ { - 0.036}^{+0.036} $（$ 68 \％$ c.l.）;状态参数的深色能量方程$ W_0 $的测量为$ W_0 = -1.031 _ { - 0.048}^{+0.052} $（$ 68 \％$ c.l.），与宇宙学常数一致。这个结论也适用于随着时间变化的状态深色能量方程，为此，我们发现$ W_0 = -0.98 _ { - 0.11}^{+0.099} $和$ W_A = -0.33 _ { - 0.48}^{+0.63} $（均为$ 68 $ c.l.％$ c.l.）。从分析中排除超新星数据并不能显着削弱我们的界限。这表明，使用单个外部BBN先验，全形和BAO数据可以在非最小宇宙学模型上提供强大的CMB独立限制。
We present limits on the parameters of the o$Λ$CDM, $w_0$CDM, and $w_0 w_a$CDM models obtained from the joint analysis of the full-shape, baryon acoustic oscillations (BAO), big bang nucleosynthesis (BBN) and supernovae data. Our limits are fully independent of the data on the cosmic microwave background (CMB) anisotropies, but rival the CMB constraints in terms of parameter error bars. We find the spatial curvature consistent with a flat universe $Ω_k=-0.043_{-0.036}^{+0.036}$ ($68\%$ C.L.); the dark-energy equation of state parameter $w_0$ is measured to be $w_0=-1.031_{-0.048}^{+0.052}$ ($68\%$ C.L.), consistent with a cosmological constant. This conclusion also holds for the time-varying dark energy equation of state, for which we find $w_0=-0.98_{-0.11}^{+0.099}$ and $w_a=-0.33_{-0.48}^{+0.63}$ (both at $68\%$ C.L.). The exclusion of the supernovae data from the analysis does not significantly weaken our bounds. This shows that using a single external BBN prior, the full-shape and BAO data can provide strong CMB-independent constraints on the non-minimal cosmological models.
