影响因子：5.8
DOI码：10.3847/1538-4357/aba52d
发表刊物：The Astrophysical Journal
摘要：We present a submillimeter continuum survey ("SCUBA2 High rEdshift bRight quasaR surveY," hereafter SHERRY) of 54 high-redshift quasars at 5.6 < z < 6.9 with quasar bolometric luminosities in the range of (0.2–5) × 1014 L⊙, using the Submillimetre Common-User Bolometer Array-2 (SCUBA2) on the James Clerk Maxwell Telescope. About 30% (16/54) of the sources are detected with a typical 850 μm rms sensitivity of 1.2 mJy beam−1 (Sν,850 μm = 4–5 mJy, at >3.5σ). The new SHERRY detections indicate far-infrared (FIR) luminosities of 3.5 × 1012 to 1.4 × 1013 L⊙, implying extreme star formation rates of 90–1060 M⊙ yr−1 in the quasar host galaxies. Compared with z = 2–5 samples, the FIR-luminous quasars (LFIR > 1013 L⊙) are rarer at z ∼ 6. The optical/near-infrared spectra of these objects show that 11% (6/54) of the sources have weak Lyα emission-line features, which may relate to different subphases of the central active galactic nuclei (AGNs). Our SCUBA2 survey confirms the trend reported in the literature that quasars with submillimeter detections tend to have weaker ultraviolet (UV) emission lines compared to quasars with nondetections. The connection between weak UV quasar line emission and bright dust continuum emission powered by massive star formation may suggest an early phase of AGN–galaxy evolution, in which the broad-line region is starting to develop slowly or is shielded from the central ionization source, and has unusual properties such as weak-line features or bright FIR emission.
合写作者：Ran Wang, Xiaohui Fan, Xue-Bing Wu, Linhua Jiang, Eduardo Bañados, Bram Venemans, Yali Shao, Jianan Li, Yunhao Zhang, Chengpeng Zhang, Jeff Wagg, Roberto Decarli, Chiara Mazzucchelli, Alain Omont, and Frank Bertoldi
第一作者：Qiong Li
卷号：900
期号：1
页面范围：12
是否译文：否
发表时间：2020-08-27
收录刊物：SCI
发布期刊链接：https://iopscience.iop.org/article/10.3847/1538-4357/aba52d