First Sunyaev–Zel’dovich mapping with the NIKA2 camera: Implication of cluster substructures for the pressure profile and mass estimate
First Sunyaev–Zel’dovich mapping with the NIKA2 camera: Implication of cluster substructures for the pressure profile and mass estimate
复制标题
使用 NIKA2 相机进行首次 Sunyaev-Zel’dovich 绘图：簇子结构对压力分布和质量估计的影响
DOI：
10.1051/0004-6361/201732558
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发表时间：
2017
影响因子：
6.5
通讯作者：
R. Zylka
中科院分区：
文献类型：
--
作者：
F. Ruppin;F. Mayet;G. Pratt;R. Adam;P. Ade;P. Andr'e;M. Arnaud;H. Aussel;I. Bartalucci;A. Beelen;A. Benoit;A. Bideaud;O. Bourrion;M. Calvo;A. Catalano;B. Comis;M. Petris;F. Désert;S. Doyle;E. Driessen;J. Goupy;C. Kramer;G. Lagache;S. Leclercq;J. Lestrade;J. Mac'ias;P. Mauskopf;A. Monfardini;L. Perotto;G. Pisano;E. Pointecouteau;N. Ponthieu;V. Rev'eret;A. Ritacco;C. Romero;H. Roussel;K. Schuster;A. Sievers;C. Tucker;R. Zylka
高红移星系团从核心到外围的压强分布的完整表征是研究大尺度结构形成的一个重要问题。在基于星系团统计的宇宙学研究中，限制质量可观测标度关系的斜率和散射度的潜在红移演化是至关重要的。本文从新的IRAM Kids阵列(NIKA2)SZ大型程序的样本出发，首次给出了星系团的热Sunyaev-Zel‘dovich(TSZ)映射，该程序旨在约束星系团压强分布的红移演化和TSZ-质量标度关系。我们用NIKA2相机观测了红移z=0.58的PSZ2 G144.83+25.11星系团。NIKA2相机是一台双波段(150 GHz和260 GHz)的仪器，运行在IRAM的30米望远镜上。我们在PSZ2G144.83+25.11的西南区发现了一个热压过剩和一个高红移的亚毫米点源，它们影响了该星系团的星团内介质(ICM)形态。NIKA2数据与多路SQUID/TES阵列在90千兆赫(Mustang)、Bolocam和Planck实验上获得的Tsz数据相结合，以便非参数地设置从星系团核心(R~0.02R500)到其外围(R~3R500)的电子压力分布的最佳约束。我们研究了超压区对压力分布形状和对积分康普顿参数Y500的约束的影响。通过结合TSZ约束的压力分布和XMM-牛顿反投影的电子密度分布，还进行了静水质量分析。这使我们可以得出结论，从分析获得的Y500和M500的估计分别不同65%和79%的干扰ICM区域的掩蔽和不掩蔽。这项工作突出表明，当与类似角度分辨率的X射线观测协同使用时，NiKA2将对Y500−M500标度关系的散射特性的表征产生关键影响，因为它具有限制ICM热力学和形态性质的高潜力。本研究还为NIKA2 Tsz大型计划中包含的所有集群展示了将交付给社区的典型产品。
The complete characterization of the pressure profile of high-redshift galaxy clusters, from their core to their outskirts, is a major issue for the study of the formation of large-scale structures. It is essential to constrain a potential redshift evolution of both the slope and scatter of the mass-observable scaling relations used in cosmology studies based on cluster statistics. In this paper, we present the first thermal Sunyaev–Zel’dovich (tSZ) mapping of a cluster from the sample of the New IRAM Kids Arrays (NIKA2) SZ large program that aims at constraining the redshift evolution of cluster pressure profiles and the tSZ-mass scaling relation. We observed the galaxy cluster PSZ2 G144.83+25.11 at redshift z = 0.58 with the NIKA2 camera, a dual-band (150 and 260 GHz) instrument operated at the Institut de Radioastronomie Millimtrique (IRAM) 30-m telescope. We identify a thermal pressure excess in the south-west region of PSZ2 G144.83+25.11 and a high-redshift sub-millimeter point source that affect the intracluster medium (ICM) morphology of the cluster. The NIKA2 data are used jointly with tSZ data acquired by the Multiplexed SQUID/TES Array at Ninety Gigahertz (MUSTANG), Bolocam, and Planck experiments in order to non-parametrically set the best constraints on the electronic pressure distribution from the cluster core (R ~ 0.02R500) to its outskirts (R ~ 3R500). We investigate the impact of the over-pressure region on the shape of the pressure profile and on the constraints on the integrated Compton parameter Y500. A hydrostatic mass analysis is also performed by combining the tSZ-constrained pressure profile with the deprojected electronic density profile from XMM-Newton. This allows us to conclude that the estimates of Y500 and M500 obtained from the analysis with and without masking the disturbed ICM region differ by 65% and 79%, respectively. This work highlights that NIKA2 will have a crucial impact on the characterization of the scatter of the Y500−M500 scaling relation due to its high potential to constrain the thermodynamic and morphological properties of the ICM when used in synergy with X-ray observations of similar angular resolution. This study also presents the typical products that will be delivered to the community for all clusters included in the NIKA2 tSZ Large Program.
DOI：
10.1088/0004-637x/807/1/2
发表时间：
2015-05
期刊：
The Astrophysical Journal
影响因子：
--
作者：
L. Cleeves;E. Bergin;T. J. H. U. O. Michigan;U. Exeter
通讯作者：
L. Cleeves;E. Bergin;T. J. H. U. O. Michigan;U. Exeter