Non-parametric deprojection of NIKA SZ observations: Pressure distribution in the Planck-discovered cluster PSZ1 G045.85+57.71
F. Ruppin, R. Adam, B. Comis, P. Ade, P. André, M. Arnaud, A. Beelen, A. Benoît, A. Bideaud, N. Billot, O. Bourrion, M. Calvo, A. Catalano, G. Coiffard, A. D'Ad… 展开作者
F. Ruppin, R. Adam, B. Comis, P. Ade, P. André, M. Arnaud, A. Beelen, A. Benoît, A. Bideaud, N. Billot, O. Bourrion, M. Calvo, A. Catalano, G. Coiffard, A. D'Addabbo, M. De Petris, F. -X. Désert, S. Doyle, J. Goupy, C. Kramer, S. Leclercq, J. F. Macías-Pérez, P. Mauskopf, F. Mayet, A. Monfardini, F. Pajot, E. Pascale, L. Perotto, G. Pisano, E. Pointecouteau, N. Ponthieu, G. W. Pratt, V. Revéret, A. Ritacco, L. Rodriguez, C. Romero, K. Schuster, A. Sievers, S. Triqueneaux, C. Tucker, R. Zylka
The determination of the thermodynamic properties of clusters of galaxies at intermediate and high redshift can bring new insights into the formation of large-scale structures. It is essential for a robust calibration of the mass-observable scaling relations and their scatter, which are key ingredients for precise cosmology using cluster statistics. Here we illustrate an application of high resolution $(< 20$ arcsec) thermal Sunyaev-Zel'dovich (tSZ) observations by probing the intracluster medium (ICM) of the \planck-discovered galaxy cluster \psz\ at redshift $z = 0.61$, using tSZ data obtained with the NIKA camera, which is a dual-band (150 and 260~GHz) instrument operated at the IRAM 30-meter telescope. We deproject jointly NIKA and \planck\ data to extract the electronic pressure distribution from the cluster core ($R \sim 0.02\, R_{500}$) to its outskirts ($R \sim 3\, R_{500}$) non-parametrically for the first time at intermediate redshift. The constraints on the resulting pressure profile allow us to reduce the relative uncertainty on the integrated Compton parameter by a factor of two compared to the \planck\ value. Combining the tSZ data and the deprojected electronic density profile from \xmm\ allows us to undertake a hydrostatic mass analysis, for which we study the impact of a spherical model assumption on the total mass estimate. We also investigate the radial temperature and entropy distributions. These data indicate that \psz\ is a massive ($M_{500} \sim 5.5 \times 10^{14}$ M$_{\odot}$) cool-core cluster. This work is part of a pilot study aiming at optimizing the treatment of the NIKA2 tSZ large program dedicated to the follow-up of SZ-discovered clusters at intermediate and high redshifts. (abridged)
Impact of ICM disturbances on the mean pressure profile of galaxy clusters: a prospective study of the NIKA2 SZ large program with MUSIC synthetic clusters
The Three Hundred-NIKA2 Sunyaev-Zeldovich Large Program twin samples: Synthetic clusters to support real observations
THE THREE HUNDRED Project的模拟数据库已被用于挑选具有接近NIKA 2相机Sunyaev-Zeldovich（SZ）大型计划的观测目标的属性的合成星系团。交叉匹配的集群参数，如在两个数据库中的集群的质量和红移已被实施，以产生所谓的双样本的大型计划。这个SZ大型计划正在观测一组中高红移$\left( 0.5 < z < 0.9 \right)$的星系团，覆盖一个数量级的质量。这些是从普朗克和阿塔卡马宇宙望远镜目录中选择的SZ星系团，其中选择是基于它们的积分康普顿参数值，$Y_{500}$：特征半径$R_{500}$内的参数值。300个流体动力学模拟为我们提供了数百个满足这些红移、质量和$Y_{500}$要求的星系团。除了标准的模拟后处理分析，模拟观测地图可模仿X射线，光学，引力透镜，无线电和SZ观测的星系团。采用孪生样本的主要目的是比较不同的集群质量代理从合成的X射线，SZ效应和光学地图（通过成员星系的速度色散和透镜$κ$ -地图）的集群。最终，不同质量代理和集群质量之间的标度律将互相关，以减少推断质量上的分散性，并且质量偏差将与各种物理参数相关。
