论文标题
Clauds和HSC-SSP关节深度调查中的小组和原始候选者
Groups and protocluster candidates in the CLAUDS and HSC-SSP joint deep surveys
论文作者
论文摘要
使用Yang等人开发的扩展基于光晕的组发现器。 （2021），它能够通过光谱和光度红移来处理星系，我们从宽阔的红移范围内（$ 0 <z <6 $）构建了星系组和候选ProtoCluster目录，从联合CFHT COFHT大面积$ u $ - u $ - u $ - u $ - u $ - u $ - u $ - u $ - u $ - u $ - clauds和hyper suprime-cam subercam subcam subcam subcam subscam strapic sepic select（HHT）策略（HYPAR）策略性策略（HH）。基于选择5,607,052个星系，带有$ i $ band量$ m_ {i} <26 $和$ 34.41 \ {\ rm veg}^2 $的天空覆盖范围，我们总共确定了2,232,134组，其中402,947组在302,947组内至少有三个成员的星系。我们已经在视觉上检查并讨论了这些最富有的小组的一般属性，红移$ z> 2.0美元。通过检查$ 5-7 \ H^{ - 1} \ Mathrm {mpc} $投影的分离和红移差$ΔZ\ le 0.1 $在RedShift $ Z> 2 $周围的RedShift差异$ΔZ\ le 0.1 $，通过$ 3 \ leq z <4 $和$ z \ geq 4 $。通常，这些星系组和原始群集候选者的目录将在探测沿宇宙时间的星系演化方面提供有用的环境信息。
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 ($0 < z < 6$) from the joint CFHT Large Area $U$-band Deep Survey (CLAUDS) and Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) deep data set. Based on a selection of 5,607,052 galaxies with $i$-band magnitude $m_{i} < 26$ and a sky coverage of $34.41\ {\rm deg}^2$, we identify a total of 2,232,134 groups, within which 402,947 groups have at least three member galaxies. We have visually checked and discussed the general properties of those richest groups at redshift $z>2.0$. By checking the galaxy number distributions within a $5-7\ h^{-1}\mathrm{Mpc}$ projected separation and a redshift difference $Δz \le 0.1$ 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.
