NIKA2摄像机看到的大量合并群集PSZ2G091

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NIKA2摄像机看到的大量合并群集PSZ2G091

Massive merging cluster PSZ2G091 as seen by the NIKA2 camera

论文作者

Artis, E., Adam, R., Ade, P., Ajeddig, H., André, P., Arnaud, M., Aussel, H., Bartalucci, I., Beelen, A., Benoît, A., Berta, S., Bing, L., Bourrion, O., Calvo, M., Catalano, A., De Petris, M., Désert, F. -X., Doyle, S., Driessen, E. F. C., Ferragamo, A., Gomez, A., Goupy, J., Hanser, C., Kéruzoré, F., Kramer, C., Ladjelate, B., Lagache, G., Leclercq, S., Lestrade, J. -F., Macías-Pérez, J. -F., Maury, A., Mauskopf, P., Mayet, F., Monfardini, A., Muñoz-Echeverría, M., Paliwal, A., Perotto, L., Pisano, G., Pointecouteau, E., Ponthieu, N., Pratt, G. W., Revéret, V., Rigby, A. J., Ritacco, A., Romero, C., Roussel, H., Ruppin, F., Schuster, K., Shu, S., Sievers, A., Tucker, C., Yepes, G.

论文摘要

PSZ2 G091.83+26.11是一个星系群，M500 = 7.43 x 10^14 msun z = 0.822 1。该对象表现出复杂的形态，在X射线中观察到清晰的双重性。然而，在普朗克样品中检测到并分析了一个单一的球形簇，遵循通用曲线2。该模型可能导致对热力学量的错误计算，例如压力曲线。由于未来的多波伦长群集实验将在高红移处检测到越来越多的对象，因此量化这种系统效应至关重要。在这项工作中，我们使用NIKA2摄像头的高分辨率观察结果3,4,5,6来整合群集的形态特征。这是通过将两个Halo模型拟合到SZ图像，然后通过重建产生的投影压力曲线的重建来实现的。然后，我们将这些结果与球形假设进行比较。

PSZ2 G091.83+26.11 is a galaxy cluster with M500 = 7.43 x 10^14 Msun at z = 0.822 1. This object exhibits a complex morphology with a clear bimodality observed in X-rays. However, it was detected and analysed in the Planck sample as a single, spherical cluster following a universal profile 2. This model can lead to miscalculations of thermodynamical quantities, like the pressure profile. As future multiwavelength cluster experiments will detect more and more objects at high redshifts, it is crucial to quantify this systematic effect. In this work, we use high-resolution observations of the NIKA2 camera3,4,5,6 to integrate the morphological characteristics of the cluster in our modelling. This is achieved by fitting a two-halo model to the SZ image and then by reconstruction of the resulting projected pressure profile. We then compare these results with the spherical assumption.

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