Hundreds of weak lensing shear-selected clusters from the Hyper Suprime-Cam Subaru Strategic Program S19A data
Hundreds of weak lensing shear-selected clusters from the Hyper Suprime-Cam Subaru Strategic Program S19A data
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DOI：
10.1093/pasj/psab047
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发表时间：
2021-03
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影响因子：
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通讯作者：
M. Oguri;S. Miyazaki;Xiangchong Li;Wentao Luo;I. Mitsuishi;H. Miyatake;S. More;A. Nishizawa
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作者：
M. Oguri;S. Miyazaki;Xiangchong Li;Wentao Luo;I. Mitsuishi;H. Miyatake;S. More;A. Nishizawa
我们使用 Hyper Suprime-Cam Subaru 战略计划 S19A 形状目录来构建弱透镜剪切选择的簇样本。根据使用截断高斯滤波器创建的覆盖约 510 度的孔径质量图，我们构建了 187 个剪切选择簇的目录，这些簇对应于信噪比大于 4.7 的质量图峰值。大多数剪切选择簇在光学选择簇中都有对应物，从中我们估计目录的纯度高于 95%。样本可扩展至 © 2018。日本天文学会。 ar X iv :2 10 3. 15 01 6v 2 [ astroph .C O ] 9 Jul 2 02 1 2 日本天文学会出版物，（2018），卷。通过优化滤波器函数的形状并结合用几个不同的背景星系选择创建的弱透镜质量图，00，No. 0 418剪切选择的星团具有相同的信噪比剪切。我们认为，通过使用背景源星系样本并采用内边界大于约2′的滤波函数，可以减轻簇成员星系的稀释和遮蔽效应。不依赖任何重子示踪剂而选择的剪切选择星团的大样本对于星团天体物理学和宇宙学的详细研究非常有用。
We use the Hyper Suprime-Cam Subaru Strategic Program S19A shape catalog to construct weak lensing shear-selected cluster samples. From aperture mass maps covering ∼ 510 deg created using a truncated Gaussian filter, we construct a catalog of 187 shear-selected clusters that correspond to mass map peaks with the signal-to-noise ratio larger than 4.7. Most of the shear-selected clusters have counterparts in optically-selected clusters, from which we estimate the purity of the catalog to be higher than 95%. The sample can be expanded to © 2018. Astronomical Society of Japan. ar X iv :2 10 3. 15 01 6v 2 [ as tr oph .C O ] 9 J ul 2 02 1 2 Publications of the Astronomical Society of Japan, (2018), Vol. 00, No. 0 418 shear-selected clusters with the same signal-to-noise ratio cut by optimizing the shape of the filter function and by combining weak lensing mass maps created with several different background galaxy selections. We argue that dilution and obscuration effects of cluster member galaxies can be mitigated by using background source galaxy samples and adopting the filter function with its inner boundary larger than about 2′. The large samples of shear-selected clusters that are selected without relying on any baryonic tracer are useful for detailed studies of cluster astrophysics and cosmology.