A Sunyaev-Zeldovich Map of the Massive Core in the Luminous X-Ray Cluster RX J1347–1145
A Sunyaev-Zeldovich Map of the Massive Core in the Luminous X-Ray Cluster RX J1347–1145
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发光 X 射线星团 RX J1347–1145 中巨大核心的 Sunyaev-Zeldovich 图
DOI：
10.1086/312117
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
J. Delabrouille
中科院分区：
文献类型：
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作者：
E. Pointecouteau;M. Giard;A. Benoit;F. Désert;N. Aghanim;N. Coron;J. Lamarre;J. Delabrouille
我们已经映射了Sunyaev-Zeldovich（SZ）减量的方向，迄今为止已知的最明亮的X射线集群，RX J1347-1145，在z = 0.451。这是用IRAM 30米射电望远镜上运行的空竹光度计实现的，角分辨率约为23“。我们给出了2.1 mm处的星系团中心区的图，向星系团中心的康普顿化参数yc =（12.7）× 10-4，对应于迄今观测到的最深的SZ衰减。使用从X射线数据导出的气体密度分布，该测量意味着Te = 16.2 ± 3.8keV的气体温度。在流体静力平衡下，团簇的总质量为M（r < 1 Mpc）=（1.0 ± 0.3）× 10 ~（15）M，相应的气体分数fgas（r < 1 Mpc）= 19.5% ± 5.8%。
We have mapped the Sunyaev-Zeldovich (SZ) decrement in the direction of the most luminous X-ray cluster known to date, RX J1347-1145, at z = 0.451. This has been achieved with an angular resolution of about 23'' using the Diabolo photometer running on the IRAM 30 m radio telescope. We present here a map of the cluster central region at 2.1 mm. The Comptonization parameter toward the cluster center, yc = (12.7) × 10-4, corresponds to the deepest SZ decrement ever observed. Using the gas density distribution derived from X-ray data, this measurement implies a gas temperature of Te = 16.2 ± 3.8 keV. The resulting total mass of the cluster is, under hydrostatic equilibrium, M(r < 1 Mpc) = (1.0 ± 0.3) × 1015 M☉ for a corresponding gas fraction fgas(r < 1 Mpc) = 19.5% ± 5.8%.