论文标题
用热Sunyaev-Zeldovich效应和弱透镜互相关探测簇压力曲线
Probing the cluster pressure profile with thermal Sunyaev-Zeldovich effect and weak lensing cross-correlation
论文作者
论文摘要
我们面对由〜\ citet {arnaud10}提出的通用压力曲线（UPP），最近测量了来自Planck和弱重力透镜测量的Thermal Sunyaev-Zeldovich（TSZ）效应的互相关函数（TSZ）的效应。通过使用Halo模型，我们计算$ξ^{y-κ} $（镜头收敛和compton- $ y $参数）和$ξ^{y-γ_ {\ rm t}} $（镜头剪切和compton- $ y $参数），并使用观察数据拟合UPPE参数数据。在将宇宙学固定为WMAP 9年或Planck 2018最佳拟合值时，我们会发现一致的UPP参数。最佳约束参数是压力曲线浓度$ c_ {500} = r_ {500}/r _ {\ rm s} $，我们找到$ C_ {500} = 2.68^{+1.46} {+1.46} _ { - 0.96} $（WMAP-9）和$ C_} 1.91^{+1.07} _ { - 0.65} $（planck-2018）对于$ξ^{y-γ_T} $ estionator。中间半径区域$α$参数的形状索引约束至$α= 1.75^{+1.29} _ { - 0.77} $和$α= 1.65^{+0.74} _ { - 0.74} _ { - 0.5} $，分别是WMAP-9和PLANCK-2018 COSMOLOGIES。传播UPP参数的不确定性到压力曲线的不确定性导致形状和幅度的不确定性$ 3 $。进一步的调查表明，交叉相关的大多数信号来自低红色的内部光晕曲线（$ r \ r \ leqslant r _ {\ rm vir}/2 $），卤水质量的范围在$ 10^{14} $ - $ 10^{15} {15} {15} \，{\ rm m} _ \ rm m} _ \ compant弱透镜和TSZ之间的互相关信号。
We confront the universal pressure profile (UPP) proposed by~\citet{Arnaud10} with the recent measurement of the cross-correlation function of the thermal Sunyaev-Zeldovich (tSZ) effect from Planck and weak gravitational lensing measurement from the Red Cluster Sequence lensing survey (RCSLenS). By using the halo model, we calculate the prediction of $ξ^{y-κ}$ (lensing convergence and Compton-$y$ parameter) and $ξ^{y-γ_{\rm t}}$ (lensing shear and Compton-$y$ parameter) and fit the UPP parameters by using the observational data. We find consistent UPP parameters when fixing the cosmology to either WMAP 9-year or Planck 2018 best-fitting values. The best constrained parameter is the pressure profile concentration $c_{500}=r_{500}/r_{\rm s}$, for which we find $c_{500} = 2.68^{+1.46}_{-0.96}$ (WMAP-9) and $c_{500} = 1.91^{+1.07}_{-0.65}$ (Planck-2018) for the $ξ^{y-γ_t}$ estimator. The shape index for the intermediate radius region $α$ parameter is constrained to $α=1.75^{+1.29}_{-0.77}$ and $α= 1.65^{+0.74}_{-0.5}$ for WMAP-9 and Planck-2018 cosmologies, respectively. Propagating the uncertainties of the UPP parameters to pressure profiles results in a factor of $3$ uncertainty in the shape and magnitude. Further investigation shows that most of the signal of the cross-correlation comes from the low-redshift, inner halo profile ($r \leqslant r_{\rm vir}/2$) with halo mass in the range of $10^{14}$--$10^{15}\,{\rm M}_{\odot}$, suggesting that this is the major regime that constitutes the cross-correlation signal between weak lensing and tSZ.
