arXiv 2009.008772020-09-02astro-ph.GA

SCUBA2高红移亮类星体巡天：远红外特性和弱线特征

SCUBA2 High Redshift Bright Quasar Survey: Far-infrared Properties and Weak-line Features

Qiong Li, Ran Wang, Xiaohui Fan, Xue-Bing Wu, Linhua Jiang, Eduardo Banados, Bram Venemans, Yali Shao, Jianan Li, Yunhao Zhang, Chengpeng Zhang, Jeff Wagg, Robe… 展开作者

Qiong Li, Ran Wang, Xiaohui Fan, Xue-Bing Wu, Linhua Jiang, Eduardo Banados, Bram Venemans, Yali Shao, Jianan Li, Yunhao Zhang, Chengpeng Zhang, Jeff Wagg, Roberto Decarli, Chiara Mazzucchelli, Alain Omont, Frank Bertoldi

备注：: 28 pages, 10 figures, published in ApJ
发表信息：: The Astrophysical Journal, 900:12 (24pp), 2020 September 1
DOI：: 10.3847/1538-4357/aba52d

阅读 PDF

arXiv 页面 ↗HTML 原文 ↗

摘要：

我们利用詹姆斯·克拉克·麦克斯韦望远镜上的亚毫米波段普通用户测辐射热仪阵列2（SCUBA 2），在$5.6<z<6.9$对54个高红移类星体进行了亚毫米波段连续观测（SCUBA 2 High rEdshift bRight quasaR survey，以下简称SHERRY），这些类星体的辐射热光度在（0.2 $-$ $ 5)\times10^{14}\,L_{\odot}$）范围内。大约30%（16/54）的源被探测到，典型的850 $μ$ m rms灵敏度为1.2 $\rm mJy\,beam^{-1}$（$S\rm _{ν,850\,μm} = 4$ -5 mJ y，在$>3.5σ$）。新的SHERRY探测表明远红外（FIR）光度为$\rm 3.5\times10^{12}$至$\rm 1.4\times10^{13}$ $L_{\odot}$，这意味着类星体宿主星系中的极端恒星形成率为90至1060 $M_{\odot}$ yr $^{-1}$。与$z =$ 2 $-$ 5样品相比，远红外发光类星体（$L_{\rm FIR} > 10^{13}\,L_{\odot}$）在$z \sim 6$更罕见。这些天体的光学/近红外（NIR）光谱显示，11%（6/54）的源具有弱的Ly $α$，发射线特征，这可能与中央活动星系核（AGN）的不同亚相有关。我们的SCUBA 2调查证实了文献中报道的趋势，即与未探测到的类星体相比，具有亚毫米探测的类星体往往具有较弱的紫外线（UV）发射线。弱紫外线类星体线发射和明亮的尘埃连续辐射之间的联系可能表明活动星系核-星系演化的早期阶段，在这个阶段，宽线区域开始缓慢发展或被中心电离源屏蔽，并具有不寻常的特性，如弱线特征或明亮的远红外辐射。

英文摘要：

We present a submillimetre 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 a range of (0.2$-$$ 5)\times10^{14}\,L_{\odot}$, using the Submillimetre Common-User Bolometer Array-2 (SCUBA2) on the James Clerk Maxwell Telescope. About 30% (16/54) of the sources are detected with a typical 850$μ$m rms sensitivity of 1.2 $\rm mJy\,beam^{-1}$ ($S\rm _{ν,850\,μm} = 4$-5 mJy, at $>3.5σ$). The new SHERRY detections indicate far-infrared (FIR) luminosities of $\rm 3.5\times10^{12}$ to $\rm 1.4\times10^{13}$ $L_{\odot}$, implying extreme star formation rates of 90 to 1060 $M_{\odot}$ yr$^{-1}$ in the quasar host galaxies. Compared with $z =$ 2$-$5 samples, the FIR luminous quasars ($L_{\rm FIR} > 10^{13}\,L_{\odot}$) are more rare at $z \sim 6$. The optical/near-infrared (NIR) spectra of these objects show 11% (6/54) of the sources have weak Ly$α$, emission line features, which may relate to different sub-phases 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.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文