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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku observation of HCG 62: Temperature, abundance, and extended hard X-ray emission profiles
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Suzaku observation of HCG 62: Temperature, abundance, and extended hard X-ray emission profiles

机译：朱雀对HCG 62的观测：温度，丰度和扩展的硬X射线发射曲线

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摘要

The compact group of galaxies HCG 62 (z = 0.0145) was observed for 120 ks with Suzaku XIS and HXD-PIN. The XIS spectra for four annular regions were fitted with a two-temperature vapec model with variable abundance, combined with the foreground Galactic component. The Galactic component was described by a two-temperature apec model, and constrained to have a common surface brightness among the four annuli. We confirmed the multitemperature nature of the intra-group medium, as reported previously, with a doughnut-like high temperature ring at radii 3'3-6'5. Abundances of Mg, Si, S, and Fe were well-constrained. We examined the possible "high-abundance arc" at'- 2; southwest from the center; however, Suzaku data did not confirm it. We suspect that it is a misidentification of an excess hot component in this region as the Fe line. Neither XIS (5-12 keV) nor HXD-PIN (12-40 keV) gave positive detection of the extended hard X-rays previously reported with ASCA, although our upper limit did not exclude the ASCA result. The 5-12 keV intensity in the r < 33 region turned out to be 70 19% higher than the nominal CXB level, and Chandra and Suzaku data suggest a concentration of hard X-ray sources with an average photon index of F = 1.3 8 0.06. The cumulative mass of 0, Fe, and Mg in the intra-group medium and the metal mass-to-light ratio were compared with those in other groups. The possible role of AGN or galaxy mergers in this group is also discussed.
机译：使用Suzaku XIS和HXD-PIN观察了120 ks的紧凑星系HCG 62（z = 0.0145）。四个环形区域的XIS光谱与前景温度Galactic分量相结合的具有可变丰度的两温vapec模型拟合。银河系分量由两温顶点模型描述，并被约束为在四个环之间具有共同的表面亮度。如前所述，我们证实了组内培养基的多温性，在半径3'3-6'5处有一个类似甜甜圈的高温环。 Mg，Si，S和Fe的含量受到严格限制。我们检查了'-2处可能的“高丰度弧”;中心西南;但是，朱雀的数据并未证实这一点。我们怀疑这是该区域中多余的热成分误认为是Fe线。尽管我们的上限并未排除ASCA的结果，但XIS（5-12 keV）或HXD-PIN（12-40 keV）均未对以前用ASCA报告的扩展硬X射线给出阳性检测结果。 r <33区域中的5-12 keV强度比标称CXB水平高70 19％，而Chandra和Suzaku数据表明，硬X射线源浓度很高，平均光子指数为F = 1.3 8 0.06。将组内介质中的0，Fe和Mg的累积质量以及金属质轻比与其他组进行比较。还讨论了AGN或星系合并在该组中的可能作用。

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