论文标题
Alma与Sunyaev-Zel'Dovich效应成像的凤凰星系群集的深冷却核心
Deeply cooled core of the Phoenix galaxy cluster imaged by ALMA with the Sunyaev-Zel'dovich effect
论文作者
论文摘要
我们介绍了对SPT-CL J2334-4243（phoenix Galaxy群集）在Z = 0.597的热阳光Sunyaev-Zel'dovich效应（SZE），该效果（phoenix Galaxy群集）通过atacama大毫米/亚毫米/亚毫米阵列（Alma（Alma）（alma）在3中。SZE中的SZE在5英寸的Polysems contrution（在200英寸的范围内IM/spe）（在200英寸的物理量表中）。峰值噪声比超过11的星系与Chandra X射线图像相结合，Alma Sze数据进一步允许对电子温度，密度和熵的非参数re二次进行重分，可以最大程度地减少中央AGN的污染。在当前的测量误差中。凤凰簇中的半径。
We present measurements of the thermal Sunyaev-Zel'dovich effect (SZE) toward SPT-CL J2334-4243 (the Phoenix galaxy cluster) at z=0.597 by the Atacama Large Millimeter/submillimeter Array (ALMA) in Band 3. The SZE is imaged at 5" resolution (corresponding to the physical scale of 23kpc/h) within 200kpc/h from the central galaxy with the peak signal-to-noise ratio exceeding 11. Combined with the Chandra X-ray image, the ALMA SZE data further allow for non-parametric deprojection of electron temperature, density, and entropy. Our method can minimize contamination by the central AGN and the X-ray absorbing gas within the cluster, both of which largely affect the X-ray spectrum. We find no significant asymmetry or disturbance in the SZE image within the current measurement errors. The detected SZE signal agrees well with the average pressure profile of local cool-core clusters. Unlike any other known clusters, however, gas temperature drops by at least a factor of 5 toward the center. We identify ~6x10^{11} M_sun cool gas with temperature ~3keV in the inner 20kpc/h. Taken together, our results imply that the gas is indeed cooling efficiently and nearly isobarically down to this radius in the Phoenix cluster.
