Groups and protocluster candidates in the CLAUDS and HSC-SSP joint deep surveys

分类： 天文学 >> 天文学 提交时间： 2023-02-19

Qingyang Li Xiaohu Yang Chengze Liu Yipeng Jing Min He Jiasheng Huang Y. Sophia Dai Marcin Sawicki Stephane Arnouts Stephen Gwyn Thibaud Moutard H. J. Mo Kai Wang Antonios Katsianis Weiguang Cui Jiaxin Han I-Non Chiu Yizhou Gu Haojie Xu

摘要： Using the extended halo-based group finder developed by Yang et al. (2021), which is able to deal with galaxies via spectroscopic and photometric redshifts simultaneously, we construct galaxy group and candidate protocluster catalogs in a wide redshift range ($0 2.0$. By checking the galaxy number distributions within a $5-7\ h^{-1}\mathrm{Mpc}$ projected separation and a redshift difference $\Delta z \le 0.1$ around those richest groups at redshift $z>2$, we identified a list of 761, 343 and 43 protocluster candidates in the redshift bins $2\leq z<3$, $3\leq z<4$ and $z \geq 4$, respectively. In general, these catalogs of galaxy groups and protocluster candidates will provide useful environmental information in probing galaxy evolution along the cosmic time.

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