一种扩展的基于晕的星表成团/团块搜寻器：在DESI遗留成像巡天DR8上的应用
摘要
我们扩展了由\citet[][]{Yang2005a}开发的基于晕的星表成团搜寻器，以同时使用具有测光红移或光谱红移的数据。利用高分辨率N体模拟构建的模拟星系红移巡天来评估这一扩展搜寻器的性能。对于DESI遗留成像巡天（Legacy Surveys）中星等、红移的星系，我们的成团搜寻器在约的质量的晕中成功识别出超过的成员。探测到的质量的成团其纯度（真实成团所占比例）大于。分配给每个成团的晕质量在高质量端的不确定性约为0.2 dex，在低质量端约为0.40 dex。成员数大于10的成团红移精度约为。我们将此成团搜寻器应用于Legacy Surveys DR8，发现了520万个至少含3个成员的成团。其中约387,000个成团至少含10个成员。所得星表包含三维坐标、 richness（富度）、晕质量与成团总光度，已公开提供。
引用
@article{arxiv.2012.14998,
title = {An Extended Halo-based Group/Cluster finder: application to the DESI legacy imaging surveys DR8},
author = {Xiaohu Yang and Haojie Xu and Min He and Yizhou Gu and Antonios Katsianis and Jiacheng Meng and Feng Shi and Hu Zou and Youcai Zhang and Chengze Liu and Zhaoyu Wang and Fuyu Dong and Yi Lu and Qingyang Li and Yangyao Chen and Huiyuan Wang and Houjun Mo and Jian Fu and Hong Guo and Alexie Leauthaud and Yu Luo and Jun Zhang and Ying Zu},
journal= {arXiv preprint arXiv:2012.14998},
year = {2022}
}
备注
Due to a bug in our code, our calculation of the completeness and interloper fraction of the group members was not correct, which resulted in our choice of a low background B=2.5. In this new version of the paper, we updated results with the theoretical fiducial background B=10. Most of the changes in the figures are virtually too small to notice. This version supersedes the one published in ApJ