DISCOVERY OF EIGHT z similar to 6 QUASARS IN THE SLOAN DIGITAL SKY SURVEY OVERLAP REGIONS
文献类型：期刊论文
| 作者 | Jiang, Linhua1,2; McGreer, Ian D.3; Fan, Xiaohui3; Bian, Fuyan4; Cai, Zheng3; Clement, Benjamin3; Wang, Ran1; Fan, Zhou5
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2015-06-01 |
| 卷号 | 149期号:6 |
| 关键词 | cosmology: observations quasars: emission lines quasars: general |
| 英文摘要 | We present the discovery of eight quasars at z similar to 6 identified in the Sloan Digital Sky Survey (SDSS) overlap regions. Individual SDSS imaging runs have some overlap with each other, leading to repeat observations over an area spanning >4000 deg(2) (more than one-fourth of the total footprint). These overlap regions provide a unique data set that allows us to select high-redshift quasars more than 0.5 mag fainter in the z band than those found with the SDSS single-epoch data. Our quasar candidates were first selected as i-band dropout objects in the SDSS imaging database. We then carried out a series of follow-up observations in the optical and near-IR to improve photometry, remove contaminants, and identify quasars. The eight quasars reported here were discovered in a pilot study utilizing the overlap regions at high galactic latitude (vertical bar b vertical bar > 30 degrees). These quasars span a redshift range of 5.86< z< 6.06 and a flux range of 19.3< z(AB)< 20.6 mag. Five of them are fainter than z(AB) = 20 mag, the typical magnitude limit of z similar to 6 quasars used for the SDSS single-epoch images. In addition, we recover eight previously known quasars at z similar to 6 that are located in the overlap regions. These results validate our procedure for selecting quasar candidates from the overlap regions and confirming them with follow-up observations, and they provide guidance to a future systematic survey over all SDSS imaging regions with repeat observations. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000355250400011 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5681]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA 3.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 4.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia 5.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Linhua,McGreer, Ian D.,Fan, Xiaohui,et al. DISCOVERY OF EIGHT z similar to 6 QUASARS IN THE SLOAN DIGITAL SKY SURVEY OVERLAP REGIONS[J]. ASTRONOMICAL JOURNAL,2015,149(6). |
| APA | Jiang, Linhua.,McGreer, Ian D..,Fan, Xiaohui.,Bian, Fuyan.,Cai, Zheng.,...&Fan, Zhou.(2015).DISCOVERY OF EIGHT z similar to 6 QUASARS IN THE SLOAN DIGITAL SKY SURVEY OVERLAP REGIONS.ASTRONOMICAL JOURNAL,149(6). |
| MLA | Jiang, Linhua,et al."DISCOVERY OF EIGHT z similar to 6 QUASARS IN THE SLOAN DIGITAL SKY SURVEY OVERLAP REGIONS".ASTRONOMICAL JOURNAL 149.6(2015). |
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来源：国家天文台
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