A Deep Ly alpha Survey in ECDF-S and COSMOS. I. General Properties of Ly alpha Emitters at z similar to 2
文献类型：期刊论文
| 作者 | Hao, Cai-Na4; Huang, Jia-Sheng5,6; Xia, Xiaoyang4; Zheng, Xianzhong7; Jiang, Chunyan1; Li, Cheng2,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018-09-10 |
| 卷号 | 864期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Galaxies: Evolution Galaxies: Formation Galaxies: High-redshift Galaxies: Luminosity Function, Mass Function Galaxies: Star Formation |
| DOI | 10.3847/1538-4357/aad80b |
| 英文摘要 | Ly alpha emitters (LAEs) may represent an important galaxy population in the low-mass regime. We present our deep narrowband imaging surveys in the COSMOS and ECDF-S fields and study the properties of LAEs at z = 2.23 +/- 0.03. The narrowband surveys conducted at the Magellan II telescope allow us to obtain a sample of 452 LAEs, reaching a 5 sigma limiting magnitude of similar to 26 mag. Our Ly alpha luminosity functions extend to L(Ly alpha) = 10(418) erg s(-1) with a steep faint-end slope. Using multiwavelength ancillary data, especially the deep Spitzer/JRAC 3.6 and 4.5 mu m photometric data, we obtained reliable stellar mass estimates for 130 IRAC-detected LAEs, spanning a range of 8 < log(M-*/M-circle dot) < 11.5. For the remaining IRAC-undetected LAEs, the median-stacked spectral energy distribution yields a stellar mass of log (M-*/M-circle dot) = 7.97(-0.07)(+0.05) and the rest-frame ultraviolet emission indicates a median star formation rate (SFR) of log (SFR/M-circle dot yr(-1)) = 0.14 +/- 0.35. There are six LAEs detected by the Spitzer/MIPS 24 mu m or even Herschel far-infrared observations. Taking into account the six mid-IR/far-IR-detected LAEs, our LAEs cover a wide range in the SFR (1 M-circle dot yr(-1) < SFR < 2000 M-circle dot yr(-1)) Although LAEs as a population are diverse in their stellar properties, they are mostly low-mass star-forming galaxies and follow the star formation main-sequence relations or their extrapolations to the low-mass end, implying a normal star-forming nature of LAEs. The clustering analysis indicates that our LAEs reside in dark matter halos with log (M-h/M-circle dot) = 10.8(-1.1)(+0.56), suggesting that they are progenitors of local LMC-like galaxies. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000444411900004 |
| 源URL | [http://119.78.226.72/handle/331011/32237]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Hao, Cai-Na |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 3.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 4.Tianjin Normal Univ, Tianjin Astrophys Ctr, Tianjin 300387, Peoples R China 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 6.Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS65, Cambridge, MA 02138 USA 7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hao, Cai-Na,Huang, Jia-Sheng,Xia, Xiaoyang,et al. A Deep Ly alpha Survey in ECDF-S and COSMOS. I. General Properties of Ly alpha Emitters at z similar to 2[J]. ASTROPHYSICAL JOURNAL,2018,864(2). |
| APA | Hao, Cai-Na,Huang, Jia-Sheng,Xia, Xiaoyang,Zheng, Xianzhong,Jiang, Chunyan,&Li, Cheng.(2018).A Deep Ly alpha Survey in ECDF-S and COSMOS. I. General Properties of Ly alpha Emitters at z similar to 2.ASTROPHYSICAL JOURNAL,864(2). |
| MLA | Hao, Cai-Na,et al."A Deep Ly alpha Survey in ECDF-S and COSMOS. I. General Properties of Ly alpha Emitters at z similar to 2".ASTROPHYSICAL JOURNAL 864.2(2018). |
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来源：上海天文台
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