论文标题
共同拟合弱透镜，X射线和Sunyaev-Zel'Dovich数据，以限制标量理论的标量理论
Jointly fitting weak lensing, X-ray and Sunyaev-Zel'dovich data to constrain scalar-tensor theories with clusters of galaxies
论文作者
论文摘要
退化的高阶标量调整器（DOHOST）理论被认为是标量调整理论的最一般类别，因此上面的任何约束都适用于整个标量张量模型。 DHOST理论即使在星系簇刻度上也改变了重力定律，因此影响了弱透镜（WL），X射线和Sunyaev-Zel'Dovich可观测值。我们得出了镜头收敛$κ$的理论表达，以及在DHOST理论框架中的簇的压力曲线$ p $，并量化了它们与一般相对性（GR）对应物的偏离程度。我们认为，$κ$，$ p $以及电子数密度（$ n_e $）的组合度量可以限制群集和DHOST理论参数。我们进行了Fisher矩阵预测分析，以研究是否确实是考虑到空间分辨率的不同情况以及测得数量的错误的情况。
Degenerate higher-order scalar-tensor (DHOST) theories are considered the most general class of scalar-tensor theories so that any constraints on them apply to the full set of scalar-tensor models. DHOST theories modify the laws of gravity even at galaxy clusters scale hence affecting the weak lensing (WL), X-ray and Sunyaev-Zel'dovich observables. We derive the theoretical expression for the lensing convergence $κ$, and the pressure profile $P$, of clusters in the framework of DHOST theories, and quantify how much they deviate from their General Relativity (GR) counterparts. We argue that combined measurements of $κ$, $P$, and of the electron number density, $n_e$, can constrain both the cluster and DHOST theory parameters. We carry on a Fisher matrix forecasts analysis to investigate whether this is indeed the case considering different scenarios for the spatial resolution and errors on the measured quantities.
