论文标题
星系簇内外的热和非热组件Abell 399和Abell 401
The thermal and non-thermal components within and between galaxy clusters Abell 399 and Abell 401
论文作者
论文摘要
我们使用低频阵列（Lofar）和Atacama Cosmology TeleScope（ACT） + \ planck的地图，测量了两个星系簇（Abell〜399 and Abell〜401）之间无线电发射和compton-y $信号之间的局部相关性。这些数据集允许我们以$ \ sim $ arcminute分辨率对此进行第一个测量。我们发现无线电亮度缩放为$ f _ {\ mathrm {Radio}} \ propto y^{1.5} $，用于Abell〜401和$ f _ {\ Mathrm {Radio}} \ propto y^2.8} $ for Abell〜399。此外，使用\ XMM数据，我们为两个簇中的无线电和X射线亮度之间的sublinear相关性（$ f _ {\ m atrm {radio}} \ propto f _ {\ rm x}}^0.7} $）。最后，我们将compton- $ y $和X射线数据关联，发现等温模型与群集配置文件一致，$ y \ propto f _ {\ rm x}^{0.5} $。通过采用等温线 - $β$模型，我们首次可以共同使用无线电，X射线和compton- $ y $数据来估算磁场配置文件的缩放索引，$ b（r）\ propto n _ {\ m mathrm {e}}（e}}}（r）^η$在注射率和re-acceleraserasilisal and re-acceleraseral and re-accel scelar and in n $ scelerasios。在应用此模型时，我们发现合并的无线电和compton-$ y $信号与整个群集的X射线的相关性与数据集的独立相关时的相关性明显更紧密。我们发现$η\ sim 0.6 { - } 0.8 $。这些结果与我们在Abell 〜401中两个射电星系的旋转测量值相一致，我们得出了磁场的缩放指数。我们还测量了簇之间的细丝中的无线电，康普顿$ $和X射线相关性，但得出结论，要确定细丝中的相关性需要更深入的数据。
We measure the local correlation between radio emission and Compton-$y$ signal across two galaxy clusters, Abell~399 and Abell~401, using maps from the Low-Frequency Array (LOFAR) and the Atacama Cosmology Telescope (ACT) + \Planck. These datasets allow us to make the first measurement of this kind at $\sim$arcminute resolution. We find that the radio brightness scales as $F_{\mathrm{radio}} \propto y^{1.5}$ for Abell~401 and $F_{\mathrm{radio}} \propto y^{2.8}$ for Abell~399. Furthermore, using \XMM data, we derive a sublinear correlation between radio and X-ray brightness for both the clusters ($F_{\mathrm{radio}} \propto F_{\rm X}^{0.7}$). Finally, we correlate the Compton-$y$ and X-ray data, finding that an isothermal model is consistent with the cluster profiles, $y \propto F_{\rm X}^{0.5}$. By adopting an isothermal--$β$ model, we are able, for the first time, to jointly use radio, X-ray, and Compton-$y$ data to estimate the scaling index for the magnetic field profile, $B(r) \propto n_{\mathrm{e}}(r)^η$ in the injection and re-acceleration scenarios. Applying this model, we find that the combined radio and Compton-$y$ signal exhibits a significantly tighter correlation with the X-ray across the clusters than when the datasets are independently correlated. We find $η\sim 0.6{-}0.8$. These results are consistent with the upper limit we derive for the scaling index of the magnetic field using rotation measure values for two radio galaxies in Abell~401. We also measure the radio, Compton-$y$, and X-ray correlations in the filament between the clusters but conclude that deeper data are required for a convincing determination of the correlations in the filament.
