中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Discovery of Four Apparently Cold Dusty Galaxies at z=3.62-5.85 in the COSMOS Field: Direct Evidence of Cosmic Microwave Background Impact on High-redshift Galaxy Observables

文献类型:期刊论文

作者Jin, S.9,10,11,12,13; Daddi, E.12; Magdis, G. E.5,6,7,8; Liu, D.4; Schinnerer, E.4; Papadopoulos, P. P.2,3; Gu, Q.9,13; Gao, Y.1; Calabro, A.12
刊名ASTROPHYSICAL JOURNAL
出版日期2019-12-20
卷号887期号:2页码:15
ISSN号0004-637X
DOI10.3847/1538-4357/ab55d6
通讯作者Jin, S.(shuowen.jin@gmail.com)
英文摘要We report Atacama Large Millimeter Array (ALMA) observations of four high-redshift dusty star-forming galaxy candidates selected from far-infrared (FIR)/submillimeter observations in the COSMOS field. We securely detect all galaxies in the continuum and spectroscopically confirm them at z = 3.62-5.85 using ALMA 3 mm line scans, detecting multiple CO and/or [C I] transitions. This includes the most distant dusty galaxy currently known in the COSMOS field, ID85001929 at z = 5.847. These redshifts are lower than we had expected, as these galaxies have substantially colder dust temperatures (i.e., their spectral energy distributions peak at longer rest-frame wavelengths) than most literature sources at z > 4. The observed cold dust temperatures are best understood as evidence for optically thick dust continuum in the FIR, rather than the result of low star formation efficiency with rapid metal enrichment. We provide direct evidence that, given their cold spectral energy distributions, cosmic microwave background (CMB) plays a significant role in biasing their observed Rayleigh-Jeans (RJ) slopes to unlikely steep values and, possibly, reducing their CO fluxes by a factor of two. We recover standard RJ slopes when the CMB contribution is taken into account. High-resolution ALMA imaging shows compact morphology and evidence for mergers. This work reveals a population of cold dusty star-forming galaxies that were underrepresented in current surveys and are even colder than typical main-sequence galaxies at the same redshift. High FIR dust optical depth might be a widespread feature of compact starbursts at any redshift.
WOS关键词STAR-FORMATION HISTORY ; STARBURST GALAXIES ; LEGACY SURVEY ; LINES ; EMISSION ; HERSCHEL ; UNIVERSE ; DEG(2) ; BRIGHT ; ALMA
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000506012000038
源URL[http://libir.pmo.ac.cn/handle/332002/35562]  
专题中国科学院紫金山天文台
通讯作者Jin, S.
作者单位1.Chinese Acad Sci, Purple Mt Observ, Key Lab Radio Astron, 8 Yuanhua Rd, Nanjing 210034, Peoples R China
2.Acad Athens, Res Ctr Astron, Soranou Efesiou 4, GR-11527 Athens, Greece
3.Aristotle Univ Thessaloniki, Dept Phys, Sect Astrophys Astron & Mech, Thessaloniki 54124, Greece
4.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
5.Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, Athens 15236, Greece
6.Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark
7.Tech Univ Denmark, DTU Space, Lyngby, Denmark
8.Univ Copenhagen, Niels Bohr Inst, Cosm Dawn Ctr, Copenhagen, Denmark
9.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing, Jiangsu, Peoples R China
10.Univ La Laguna, Dpto Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain
推荐引用方式
GB/T 7714
Jin, S.,Daddi, E.,Magdis, G. E.,et al. Discovery of Four Apparently Cold Dusty Galaxies at z=3.62-5.85 in the COSMOS Field: Direct Evidence of Cosmic Microwave Background Impact on High-redshift Galaxy Observables[J]. ASTROPHYSICAL JOURNAL,2019,887(2):15.
APA Jin, S..,Daddi, E..,Magdis, G. E..,Liu, D..,Schinnerer, E..,...&Calabro, A..(2019).Discovery of Four Apparently Cold Dusty Galaxies at z=3.62-5.85 in the COSMOS Field: Direct Evidence of Cosmic Microwave Background Impact on High-redshift Galaxy Observables.ASTROPHYSICAL JOURNAL,887(2),15.
MLA Jin, S.,et al."Discovery of Four Apparently Cold Dusty Galaxies at z=3.62-5.85 in the COSMOS Field: Direct Evidence of Cosmic Microwave Background Impact on High-redshift Galaxy Observables".ASTROPHYSICAL JOURNAL 887.2(2019):15.

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