论文标题
WMDF JWST/GTO的强镜模型非常丰富的集群Abell 1489
A Strong-Lensing Model for the WMDF JWST/GTO Very Rich Cluster Abell 1489
论文作者
论文摘要
我们提出了Galaxy群集RM J121218.5+273255.1（$ Z = 0.35 $;以后的RMJ1212;也称为Abell 1489）的第一个强透镜模型。该群集是Redmapper目录中最高的0.1 \％最丰富的簇之一。在X射线和通过Sunyaev-Zel'Dovich效应中，分别在Rosat和\ emph {planck}数据中显着检测到它。它的光亮度分布意味着在质量到光度缩放关系之后，非常大的镜头。基于这些属性，它被选为Webb Medium Deep Fields（WMDF）JWST/GTO程序。为了准备该程序，最近在双子座北部的GMO中对RMJ1212进行了成像，并使用\ emph {Hubble Space望远镜}中的七个光学和近红外带中成像。我们使用这些数据来绘制群集的内部质量分布，从而揭示了各种多个图像集。我们还搜索数据中的高红移候选者以及瞬态源。我们发现，基于光度红移和辍学技术，我们发现了十几个高红移（$ z \ gtrsim6 $）候选者。在两个HST访问之间的数据中没有发现突出的（$ \gtrsim5σ$）。我们的镜头分析揭示了一个相对较大的镜头，其有效的爱因斯坦半径为$θ_{e} \ simeq32 \ pm3'''$（$ z_ {s} = 2 $），与扩展期望的期望很大一致。 RMJ1212证明，可以按照光跟踪质量假设以强大而自动化的方式选择强大的镜头簇。
We present a first strong-lensing model for the galaxy cluster RM J121218.5+273255.1 ($z=0.35$; hereafter RMJ1212; also known as Abell 1489). This cluster is amongst the top 0.1\% richest clusters in the redMaPPer catalog; it is significantly detected in X-ray and through the Sunyaev-Zel'dovich effect in ROSAT and \emph{Planck} data, respectively; and its optical luminosity distribution implies a very large lens, following mass-to-light scaling relations. Based on these properties it was chosen for the Webb Medium Deep Fields (WMDF) JWST/GTO program. In preparation for this program, RMJ1212 was recently imaged with GMOS on Gemini North and in seven optical and near-infrared bands with the \emph{Hubble Space Telescope}. We use these data to map the inner mass distribution of the cluster, uncovering various sets of multiple images. We also search for high-redshift candidates in the data, as well as for transient sources. We find over a dozen high-redshift ($z\gtrsim6$) candidates based on both photometric redshift and the dropout technique. No prominent ($\gtrsim5 σ$) transients were found in the data between the two HST visits. Our lensing analysis reveals a relatively large lens with an effective Einstein radius of $θ_{E}\simeq32\pm3''$ ($z_{s}=2$), in broad agreement with the scaling-relation expectations. RMJ1212 demonstrates that powerful lensing clusters can be selected in a robust and automated way following the light-traces-mass assumption.
