arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1409.3571astro-ph.CO
收藏

CFHTLenS:三维匹配滤波星系团的弱透镜剪切分析

CFHTLenS: A Weak Lensing Shear Analysis of the 3D-Matched-Filter Galaxy Clusters

Jes Ford, Ludovic Van Waerbeke, Martha Milkeraitis, Clotilde Laigle, Hendrik Hildebrandt, Thomas Erben, Catherine Heymans, Henk Hoekstra, Thomas Kitching, Yanni… 展开作者

Jes Ford, Ludovic Van Waerbeke, Martha Milkeraitis, Clotilde Laigle, Hendrik Hildebrandt, Thomas Erben, Catherine Heymans, Henk Hoekstra, Thomas Kitching, Yannick Mellier, Lance Miller, Ami Choi, Jean Coupon, Liping Fu, Michael J. Hudson, Konrad Kuijken, Naomi Robertson, Barnaby Rowe, Tim Schrabback, Malin Velander

摘要:

我们提出了集群质量丰富度标度关系校准的弱透镜分析>18000星系团候选人在加拿大-法国-夏威夷望远镜透镜巡天(CFHTLenS)。使用Milkeraitis等人的3D匹配滤波器聚类发现器检测,这些簇候选者跨越了从小团尺度到$\sim10^{15} M_{\odot}$和红移0.2 $\lesssim z\lesssim$ 0.9的宽范围的质量。叠加剪切测量的总有效性为54 $σ$。我们比较集群质量确定使用弱透镜剪切和放大,发现在个别丰富的箱产生1 $σ$兼容性的测量,但放大率估计偏低。这第一次直接质量比较产生重要的见解,为改善未来的透镜放大工作的系统学处理。此外,我们确认分析表明,集群偏心有一个重要的影响所观察到的3D-MF晕配置文件,我们量化这通过拟合投影集群质心偏移,这通常是$\sim$ 0.4弧分。我们把候选的星系团作为红移的函数,在$z \sim$ 0.9的整个范围内发现了类似的星系团质量和丰富度。我们测量3D-MF质量丰富度标度关系$M_{200} = M_0 (N_{200} / 20)^β$。我们发现一个归一化的$M_0 \sim (2.7^{+0.5}_{-0.4}) \times 10^{13} M_{\odot}$,和一个对数斜率的$β\sim 1.4 \pm 0.1$,这两者都是在1 $σ$协议从放大分析的结果。我们没有发现红移依赖的正常化的证据。CFHTLenS 3D-MF星团目录现已在cfhtlens.org上提供。

英文摘要:

We present the cluster mass-richness scaling relation calibrated by a weak lensing analysis of >18000 galaxy cluster candidates in the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS). Detected using the 3D-Matched-Filter cluster-finder of Milkeraitis et al., these cluster candidates span a wide range of masses, from the small group scale up to $\sim10^{15} M_{\odot}$, and redshifts 0.2 $\lesssim z\lesssim$ 0.9. The total significance of the stacked shear measurement amounts to 54$σ$. We compare cluster masses determined using weak lensing shear and magnification, finding the measurements in individual richness bins to yield 1$σ$ compatibility, but with magnification estimates biased low. This first direct mass comparison yields important insights for improving the systematics handling of future lensing magnification work. In addition, we confirm analyses that suggest cluster miscentring has an important effect on the observed 3D-MF halo profiles, and we quantify this by fitting for projected cluster centroid offsets, which are typically $\sim$ 0.4 arcmin. We bin the cluster candidates as a function of redshift, finding similar cluster masses and richness across the full range up to $z \sim$ 0.9. We measure the 3D-MF mass-richness scaling relation $M_{200} = M_0 (N_{200} / 20)^β$. We find a normalization $M_0 \sim (2.7^{+0.5}_{-0.4}) \times 10^{13} M_{\odot}$, and a logarithmic slope of $β\sim 1.4 \pm 0.1$, both of which are in 1$σ$ agreement with results from the magnification analysis. We find no evidence for a redshift-dependence of the normalization. The CFHTLenS 3D-MF cluster catalogue is now available at cfhtlens.org.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑