Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Lyα Escape Fraction of Lyα Blobs
文献类型：期刊论文
| 作者 | Ao,Y.1,2; Matsuda,Y.1; Henkel,C.3,4; Iono,D.1; Alexander,D. M.5; Chapman,S. C.6; Geach,J.7; Hatsukade,B.8; Hayes,M.9; Hine,N. K.10 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2017-11-30 |
| 卷号 | 850期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: active galaxies: formation galaxies: high-redshift galaxies: ISM infrared: galaxies |
| DOI | 10.3847/1538-4357/aa960f |
| 英文摘要 | Abstract We study the heating mechanisms and Lyα escape fractions of 35 Lyα blobs (LABs) at z?≈?3.1 in the SSA22 field. Dust continuum sources have been identified in 11 of the 35 LABs, all with star formation rates (SFRs) above 100 M⊙ yr?1. Likely radio counterparts are detected in 9 out of 29 investigated LABs. The detection of submillimeter dust emission is more linked to the physical size of the Lyα emission than to the Lyα luminosities of the LABs. A radio excess in the submillimeter/radio-detected LABs is common, hinting at the presence of active galactic nuclei. Most radio sources without X-ray counterparts are located at the centers of the LABs. However, all X-ray counterparts avoid the central regions. This may be explained by absorption due to exceptionally large column densities along the line-of-sight or by LAB morphologies, which are highly orientation dependent. The median Lyα escape fraction is about 3% among the submillimeter-detected LABs, which is lower than a lower limit of 11% for the submillimeter-undetected LABs. We suspect that the large difference is due to the high dust attenuation supported by the large SFRs, the dense large-scale environment as well as large uncertainties in the extinction corrections required to apply when interpreting optical data. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-850-2-AA960F |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23593]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 2.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China 3.MPIfR, Auf dem Hügel 69, D-53121 Bonn, Germany 4.Astron. Dept., King Abdulaziz Univ., P.O. Box 80203, Jeddah 21589, Saudi Arabia 5.Centre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK 6.Dept. of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 4R2, Canada 7.Centre for Astrophysics Research, University of Hertfordshire, Hatfield, AL10 9AB, UK 8.Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan 9.Stockholm University, Department of Astronomy and Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre, SE-10691, Stockholm, Sweden 10.Centre for Astrophysics Research, School of Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane, Hatfield, Hertfordshire AL10 9AB, UK |
| 推荐引用方式 GB/T 7714 | Ao,Y.,Matsuda,Y.,Henkel,C.,et al. Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Lyα Escape Fraction of Lyα Blobs[J]. The Astrophysical Journal,2017,850(2). |
| APA | Ao,Y..,Matsuda,Y..,Henkel,C..,Iono,D..,Alexander,D. M..,...&Weiss,A..(2017).Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Lyα Escape Fraction of Lyα Blobs.The Astrophysical Journal,850(2). |
| MLA | Ao,Y.,et al."Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Lyα Escape Fraction of Lyα Blobs".The Astrophysical Journal 850.2(2017). |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。