论文标题
使用bao烙印探测少量镜头和重新电位后21 cm信号的交叉相关性
Probing Quintessence using BAO imprint on the cross-correlation of weak lensing and post-reionization HI 21 cm signal
论文作者
论文摘要
在这项工作中，我们调查了限制黑暗能量的融化典型标量场模型的可能性。我们提出，使用Baryon声学振荡（BAO）的烙印对解换后21-CM信号和星系弱透镜收敛场的互相关，以测量角色直径距离$ D_A（Z）$和HUBBLE参数$ H（Z）$ H（Z）$。然后使用这些数量的投影错误来限制典型模型参数。 We find that independent $600$hrs radio interferometric observation at four observing frequencies $916 $MHz, $650$ MHz, $520$ MHz and $430 $MHz with a SKA-1-Mid like radio telescope in cross-correlation with a deep weak lensing survey covering half the sky may measure the binned $D_A$ and $H$ at a few percent level of sensitivity.蒙特卡洛分析的权力法解冻典型模型在初始坡度$λ_i$，深色能量密度参数$ω_{ϕ0} $上给出了$ 1-σ$边缘化的边界，并分别在8.63％，10.08％和9.75％的情况下为$γ$的形状。当进行SN和其他探针的联合分析时，限制分别提高到7.66％，4.39％和5.86％。
In this work we investigate the possibility of constraining a thawing Quintessence scalar field model for dark energy. We propose using the imprint of baryon acoustic oscillation (BAO) on the cross-correlation of post-reionization 21-cm signal and galaxy weak lensing convergence field to tomographically measure the angular diameter distance $D_A(z)$ and the Hubble parameter $H(z)$. The projected errors in these quantities are then used to constrain the Quintessence model parameters. We find that independent $600$hrs radio interferometric observation at four observing frequencies $916 $MHz, $650$ MHz, $520$ MHz and $430 $MHz with a SKA-1-Mid like radio telescope in cross-correlation with a deep weak lensing survey covering half the sky may measure the binned $D_A$ and $H$ at a few percent level of sensitivity. The Monte Carlo analysis for a power law thawing Quintessence model gives the $1-σ$ marginalized bounds on the initial slope $λ_i$,dark energy density parameter $Ω_{ϕ0}$ and the shape of the potential $Γ$ at 8.63%, 10.08% and 9.75% respectively. The constraints improve to 7.66%, 4.39% and 5.86% respectively when a joint analysis with SN and other probes is performed.
