结合SCUSS与SDSS观测的类星体选择能力
星系天体物理
2015-06-23 v1
摘要
南银冠u波段天区巡天（SCUSS）在南银冠提供了约5000 deg的深u波段成像，比SDSS u波段深约1.5 mag。本文基于深SCUSS u波段成像和两历元u波段变率，评估利用SCUSS与SDSS数据选择类星体的能力。我们发现，与仅使用SDSS 数据相比，SCUSS u波段与SDSS 波段的组合能够选出更多暗弱类星体以及红移在2.2附近的类星体。类星体具有显著的u波段变率。具有大两历元变率的类星体比例远高于恒星。基于变率的选择既能选出具有紫外超的低红移类星体，也能选出中红移（）类星体，而光学颜色选源在此红移区间效率低下。上述两种选择方法互补，充分利用了SCUSS u波段的优势。
引用
@article{arxiv.1501.03352,
title = {Capability of Quasar Selection by Combining the SCUSS and SDSS Observations},
author = {Hu Zou and Xue-bing Wu and Xu Zhou and Shu Wang and Linhua Jiang and Xiaohui Fan and Zhou Fan and Zhaoji Jiang and Yipeng Jing and Michael Lesser and Cheng Li and Jun Ma and Jundan Nie and Shiyin Shen and Jiali Wang and Zhenyu Wu and Tianmeng Zhang and Zhimin Zhou},
journal= {arXiv preprint arXiv:1501.03352},
year = {2015}
}
备注
10 pages, 8 figures, accepted by PASP