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A Deep Ly alpha Survey in ECDF-S and COSMOS. I. General Properties of Ly alpha Emitters at z similar to 2
Hao, Cai-Na1; Huang, Jia-Sheng2,3; Xia, Xiaoyang1; Zheng, Xianzhong4; Jiang, Chunyan5; Li, Cheng6,7
2018-09-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume864Issue:2Pages:15
Corresponding AuthorHao, Cai-Na(hcn@bao.ac.cn)
AbstractLy 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.
Keywordgalaxies: evolution galaxies: formation galaxies: high-redshift galaxies: luminosity function, mass function galaxies: star formation
DOI10.3847/1538-4357/aad80b
WOS KeywordSTAR-FORMING GALAXIES ; FIELD-SOUTH SURVEY ; YALE-CHILE MUSYC ; X-RAY SOURCES ; ESCAPE FRACTION ; STELLAR POPULATIONS ; LUMINOSITY FUNCTION ; EMITTING GALAXIES ; MULTIWAVELENGTH SURVEY ; PHOTOMETRIC REDSHIFTS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000444411900004
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/21322
Collection中国科学院紫金山天文台
Corresponding AuthorHao, Cai-Na
Affiliation1.Tianjin Normal Univ, Tianjin Astrophys Ctr, Tianjin 300387, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS65, Cambridge, MA 02138 USA
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
5.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
6.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China
7.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China
Recommended Citation
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):15.
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),15.
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):15.
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