论文标题
关节SPT-SZ和XMM-Newton观测的细胞结构常数变化的限制
Constraints on variation of fine structure constant from joint SPT-SZ and XMM-Newton observations
论文作者
论文摘要
我们使用X-Ray测量值以及使用XMM-Newton newton optervator的X-Ray测量值，使用XMM-Newton observeration，使用XMM-Newton sublesurements搜索了电磁细胞结构常数（$α\ equiv e^2/\ hbar c $）的样品（$ 0.2 <z <z <1.5 $）的样品（$ 0.2 <z <z <1.5 $）。我们将集成的SZ Compto-Ionization与其X射线对应物的比率作为我们可观察到的搜索。我们首先使用上述比率是红移的函数，对$α$的$α$约为0.7％的限制。然后，我们寻找$α$的对数依赖性作为红移的函数：$Δα/α=-γ\ ln（1+z）$，因为这是由失控的Dilaton模型预测的。我们发现$γ$ = $ -0.046 \ pm 0.1 $，这表明没有$α$的对数变化是RedShift的函数。我们还使用相同的群集样品搜索细胞常数的偶极变化。我们找不到任何证据表明这种空间变化。
We search for a variation of the electromagnetic fine structure constant ($α\equiv e^2/\hbar c$) using a sample of 58 SZ selected clusters in the redshift range ($0.2<z<1.5$) detected by the South Pole Telescope, along with X-ray measurements using the XMM-Newton observatory. We use the ratio of the integrated SZ Compto-ionization to its X-ray counterpart as our observable for this search. We first obtain a model-independent constraint on $α$ of about 0.7%, using the fact that the aforementioned ratio is constant as a function of redshift. We then look for a logarithmic dependence of $α$ as a function of redshift: $Δα/α= -γ\ln(1+z)$, as this is predicted by runaway dilaton models. We find that $γ$ = $-0.046 \pm 0.1$, which indicates that there is no logarithmic variation of $α$ as a function of redshift. We also search for a dipole variation of the fine structure constant using the same cluster sample. We do not find any evidence for such a spatial variation.
