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首页> 外文会议>The energetic cosmos : from Suzaku to ASTRO-H >Suzaku Detection of the ICM Emission out to the Virial Radius in Abell 1689
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Suzaku Detection of the ICM Emission out to the Virial Radius in Abell 1689

机译：朱古力检测阿贝尔1689年ICM向病毒半径的排放

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Using Suzaku, we detected X-ray emission from the intra cluster medium (ICM) in Abell 1689 out to its Virial radius (15'.8 = 2.9 Mpc). The ICM temperature gradually decreases from ~ 9 keV at the center to ~ 2 keV at outskirts. Moreover, we found that the temperature of a northeast region at the Virial radius is higher (~ 5 keV) than the other azimuth regions at the same distances, and that X-ray surface brightness at the 5 keV region is ~ 2 times higher than that of the other regions. Since the cooling function at 5 keV is ~ 50% larger than that at 2 keV assuming the metal abundance is 0.1 solar, the difference of ICM densities between the 5 keV and 2 keV regions is not large, at most ~ 20%. By combining the temperature and ICM density, entropy of the 5 keV region becomes ~ 2 times larger than those of the other azimuth regions. This suggests that some heating process such as cosmological structure formation shock or sub-cluster mergers in the northwest region. The Sloan Digital Sky Survey (SDSS) data, however, shows no significant luminosity excess in i band in this region. Now we are comparing the temperature profile we obtained with that derived from the mass profile of Abell 1689 which has been obtained precisely by strong and weak lensing analyses of Subaru/Suprime-Cam and HST/ACS. By this analysis, the hydrostatic equlibrium around the Virial radius will be tested.
机译：使用朱雀，我们检测到Abell 1689内簇内介质（ICM）的X射线发射到其Virial半径（15'.8 = 2.9 Mpc）。 ICM温度从中心处的〜9 keV逐渐降低到郊区的〜2 keV。此外，我们发现在相同距离处，在Virial半径处的东北区域的温度比其他方位角区域高（〜5 keV），并且在5 keV区域的X射线表面亮度比在其他位置的X射线表面亮度高2倍。其他地区。由于假设金属丰度为0.1太阳，在5 keV时的冷却功能比在2 keV时的冷却功能大50％，因此5 keV和2 keV区域之间的ICM密度差异不大，至多为20％。通过结合温度和ICM密度，5 keV区域的熵变为其他方位角区域的熵的约2倍。这表明西北地区存在某些加热过程，例如宇宙学结构形成冲击或亚群合并。但是，斯隆数字天空调查（SDSS）数据显示，该区域的i波段没有明显的光度过剩。现在，我们将获得的温度曲线与从Abell 1689的质量曲线得出的温度曲线进行比较，该质量曲线是通过Subaru / Suprime-Cam和HST / ACS的强透镜和弱透镜分析精确获得的。通过此分析，将测试围绕Virial半径的静水平衡。

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