Halo Properties and Mass Functions of Groups/Clusters from the DESI Legacy Imaging Surveys DR9
- Wang, Jiaqi
- Yang, Xiaohu
- Zhang, Jun
- Li, Hekun
- Fong, Matthew
- Xu, Haojie
- He, Min
- Gu, Yizhou
- Luo, Wentao
- Dong, Fuyu
- Wang, Yirong
- Li, Qingyang
- Katsianis, Antonios
- Wang, Haoran
- Shen, Zhi
- Alonso, Pedro
- Liu, Cong
- Huang, Yiqi
- Liu, Zhenjie
DOIAbstract
Based on a large group/cluster catalog recently constructed from the DESI Legacy Imaging Surveys DR9 using an extended halo-based group finder, we measure and model the group-galaxy weak lensing signals for groups/clusters in a few redshift bins within redshift range $0.1 \leqslant z<0.6$. Here, the background shear signals are obtained based on the DECaLS survey shape catalog derived with the \textsc{Fourier\_Quad} method. We divide the lens samples into 5 equispaced redshift bins and 7 mass bins, which allow us to probe the redshift and mass dependence of the lensing signals and hence the resulting halo properties. In addition to these sample selections, we have also checked the signals around different group centers, e.g., brightest cent...
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