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Exploring Reionization-era Quasars. III. Discovery of 16 Quasars at 6.4 ≲ z ≲ 6.9 with DESI Legacy Imaging Surveys and the UKIRT Hemisphere Survey and Quasar Luminosity Function at z ∼ 6.7

  • Authors: Feige Wang, Jinyi Yang, Xiaohui Fan, Xue-Bing Wu, Minghao Yue, Jiang-Tao Li, Fuyan Bian, Linhua Jiang, Eduardo Bañados, Jan-Torge Schindler, Joseph R. Findlay, Frederick B. Davies, Roberto Decarli, Emanuele P. Farina, Richard Green, Joseph F. Hennawi, Yun-Hsin Huang, Chiara Mazzuccheli, Ian D. McGreer, Bram Venemans, Fabian Walter, Simon Dye, Brad W. Lyke, Adam D. Myers, and Evan Haze Nunez

2019 The Astrophysical Journal 884 30.

  • Provider: AAS Journals

Caption: Figure 4.

Redshift and absolute magnitude distribution and radio-loudness constraints of z > 6.5 quasars. The symbols are the same as in Figure 3. The solid lines denote radio-loudness calculated from the FIRST flux limit, and dashed lines denote radio-loudness calculated from the NVSS flux limit. The black, magenta, and blue curves represent R = 500, R = 100, and R = 30, respectively. It shows that both FIRST and NVSS surveys are too shallow to rule out that those z > 6.5 quasars are radio-loud quasars with R ∼ 100. But none of our newly discovered quasars are extremely radio-loud quasars with R > 500.

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