作者: Gregory R. Zeimann , Anthony H. Gonzalez , Michael McDonald , S. A. Stanford , S. A. Stanford
DOI: 10.3847/0004-637X/817/2/122
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摘要: We present a deep (100 ks) Chandra observation of IDCS J1426.5+3508, spectroscopically confirmed, infrared-selected galaxy cluster at $z = 1.75$. This is the most massive currently known > 1.5$, based on existing Sunyaev-Zel'dovich (SZ) and gravitational lensing detections. confirm this high mass via variety X-ray scaling relations, including $T_X$-M, $f_g$-M, $Y_X$-M $L_X$-M, finding tight distribution masses from these different methods, spanning M$_{500}$ 2.3-3.3 $\times 10^{14}$ M$_{\odot}$, with low-scatter $Y_X$-based $M_{500,Y_X} 2.6^{+1.5}_{-0.5} \times M$_\odot$. J1426.5+3508 only 1.5$ for which X-ray, SZ estimates exist, are in remarkably good agreement. find relatively gas-to-total ratio, employing total all aforementioned indicators, values ranging $f_{gas,500}$ 0.087-0.12. do not detect metals intracluster medium (ICM) system, placing 2$\sigma$ upper limit $Z(r 1$, first cool core 1.2$. The offset large-scale centroid suggests that has had recent ($\lesssim$500 Myr) merger/interaction another system.