PSZ2 G091: A massive double cluster at z ~ 0.822 observed by the NIKA2 camera

PSZ2 G091: A massive double cluster at z ~ 0.822 observed by the NIKA2 camera
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PSZ2 G091:NIKA2 相机观测到 z ~ 0.822 处的巨大双星团

DOI:
10.1051/epjconf/202225700003
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发表时间:
2022
影响因子:
--
通讯作者:
Artis E
Artis E
中科院分区:
--
文献类型:
--
作者:
Artis E

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PSZ2 G091.83+26.11是一个巨大的星系团,M500= 7:43 × 1014M⊙atz= 0:822。该物体表现出复杂的形态,在 X 射线中观察到具有明显的双峰性。然而,它在普朗克样本中被检测和分析为遵循通用轮廓的单个球形簇[1]。该模型可能会导致热力学量(例如压力分布)的错误计算。随着未来的多波长簇实验将检测到越来越多红移较高的物体(我们预计合并物体的比例会更高),量化这种系统效应至关重要。在这项工作中,我们使用 NIKA2 相机对 PSZ2 G091.83+26.11 的高分辨率观测,将星团的形态特征整合到我们的建模中。这是通过将两个光环模型拟合到 SZ 图像,然后重建所得的投影压力分布来实现的。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 massive galaxy cluster withM500= 7:43 × 1014M⊙atz= 0:822. This object exhibits a complex morphology with a clear bimodality observed in X-rays. However, it was detected and analysed in thePlancksample as a single, spherical cluster following a universal profile [1]. 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 higher redshifts (where we expect the fraction of merging objects to be higher), it is crucial to quantify this systematic effect. In this work, we use high-resolution observations of PSZ2 G091.83+26.11 by the NIKA2 camera 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.
DOI: --
发表时间: 2021
影响因子: 6.5
作者:
E. Artis;J. Melin;J. Bartlett;C. Murray
通讯作者: C. Murray
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发表时间: 2010-07-01
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