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A New Candidate of a Cluster of Galaxies, 2XMM J045637.2+522411

机译:星系团的新候选者,2XMM J045637.2 + 522411

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摘要

We present XMM-Newton and Suzaku results of an X-ray source, 2XMM J045637.2+522411, found during an observation of a galactic-supernova remnant (SNR), G156.2+5.7. By comparing its radial profile with the pointspread function, we found that 2XMM J045637.2+522411 is an extended source. X-ray spectra exhibited a linelike structure at 5.7-5.8 keV. Since no abundant element emits an X-ray line at 5-6 keV in the rest-frame, and the most intense emission line in the 5-7 keV energy band is a Fe-K line, the line is likely to be a redshifted Fe-K line. The overall spectra can be represented by a thin-thermal plasma model with a temperature of 3-4 keV and a redshift of 0.15-0.17. No intensity variation was found in the light curve. The observational results indicate that 2XMM J045637.2+522411 is likely to be a cluster of galaxies.
机译:我们介绍了X射线源2XMM J045637.2 + 522411的XMM-Newton和Suzaku结果,该结果是在观测银河-超新星残余(SNR)G156.2 + 5.7时发现的。通过将其径向轮廓与点扩展函数进行比较,我们发现2XMM J045637.2 + 522411是扩展源。 X射线光谱在5.7-5.8keV处显示线状结构。由于没有足够的元素在其余帧中以5-6 keV发射X射线线,并且在5-7 keV的能带中最强的发射线是Fe-K线,因此该线可能会发生红移铁钾线。整体光谱可以由温度为3-4 keV,红移为0.15-0.17的薄热等离子体模型表示。在光曲线中没有发现强度变化。观测结果表明2XMM J045637.2 + 522411可能是星系团。

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