DECADE宇宙剪切项目II：源星系样本的光度红移标定
宇宙学与河外天体物理
2025-10-24 v2 天体物理仪器与方法
摘要
我们呈现暗能量相机全数据计划(DECADE)弱引力数据集的光度红移特征化与标定：一个由暗能量相机(DECam)在北半球银河盘上观测的10700万星系目录。红移来源于宽场光度、深度场光度（伴随红移估计）以及在宽场和深度场之间建立的传递函数（通过源注入目录估计）。我们构建了四个时空箱，用于该星系目录，并采用Self-organizing Map Photo-Z(SOMPZ)方法估计每个时空箱中的红移分布。我们的估计包括样本方差、零点标定不确定性以及红移偏差的贡献，这些在深度场数据集上量化。平均红移的总不确定性为。SOMPZ估计随后与基于聚类红移方法的估计进行比较，后者通过将我们的源星系与光谱调查中的星系进行交叉相关来获得，结果彼此一致。
引用
@article{arxiv.2502.17675,
title = {The DECADE cosmic shear project II: photometric redshift calibration of the source galaxy sample},
author = {D. Anbajagane and A. Alarcon and R. Teixeira and C. Chang and L. F. Secco and C. Y. Tan and A. Drlica-Wagner and M. Adamow and R. A. Gruendl and G. Giannini and M. R. Becker and P. S. Ferguson and N. Chicoine and Z. Zhang and K. Herron and D. Suson and A. N. Alsina and A. Amon and C. R. Bom and J. A. Carballo-Bello and W. Cerny and A. Choi and Y. Choi and C. Doux and K. Eckert and M. Gatti and D. Gruen and W. G. Hartley and K. Herner and E. M. Huff and D. J. James and N. Kuropatkin and C. E. Martínez-Vázquez and P. Massana and S. Mau and J. McCullough and G. E. Medina and B. Mutlu-Pakdil and J. Myles and M. Navabi and N. E. D. Noël and A. B. Pace and M. Raveri and A. H. Riley and J. D. Sakowska and D. Sanchez-Cid and D. J. Sand and L. Santana-Silva and I. Sevilla-Noarbe and M. Soares-Santos and G. S. Stringfellow and A. K. Vivas and M. Yamamoto},
journal= {arXiv preprint arXiv:2502.17675},
year = {2025}
}
备注
[v2]: Published in OJAp