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Star-formation rates of two GRB host galaxies at z similar to 2 and a [Cii] deficit observed with ALMA
Hashimoto, Tetsuya1; Hatsukade, Bunyo2; Goto, Tomotsugu1; Kim, Seong Jin1; Ohta, Kouji3; Nagao, Tohru4; Kong, Albert K. H.1; Nakanishi, Kouichiro5,6; Mao JR(毛基荣)7,8
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019-10-01
卷号488期号:4页码:5029-5041
DOI10.1093/mnras/stz2034
产权排序第7完成单位
收录类别SCI ; EI
关键词gamma-ray burst: individual: 070521 gamma-ray burst: individual: 080207 galaxies: star formation submillimetre: galaxies
摘要

The event rate of long gamma-ray bursts (GRBs) is expected to be a useful tracer of cosmic star-formation history. For this purpose, it is necessary to understand what kinds of star formation/galaxies are traced by GRBs. Here we report rest-frame far-infrared (FIR) continuum detections of the GRB 070521 and 080207 host galaxies at z similar to 2 with Atacama Large Millimeter/submillimeter Array (ALMA) bands 8 and 9. FIR photometry provides reliable star-formation rates (SFRs), because FIR emission is free from dust extinction and possible radio contamination from the long-lived afterglows of GRBs. Spectral energy distribution fitting yields 49.85 and 123.4 M-circle dot yr(-1) for the 070521 and 080207 hosts, respectively. The derived SFRs place them on the main sequence' of normal star-forming galaxies at z similar to 2. The derived SFRs are significantly lower than those from radio observations. It is inferred that the observed radio fluxes in a previous study are contaminated by afterglows. ALMA marginally detected the [Cii]158-mu m emission line from the GRB 080207 host galaxy with signal-to-noise ratio (S/N)similar to 4. This is the first detection of [Cii]158-mu m from a GRB host at z > 2 and the second detection among known GRBs. The luminosity ratio of [Cii]158 mu m to FIR is 7.5x10(-4), which is one of the smallest values among galaxies at z similar to 1-2 with the same FIR luminosity. The [Cii] deficit' could be a new physical property with which to characterize GRB hosts at z similar to 1-2. Possible parameters controlling the deficit include the metallicity, initial mass function and gas density.

资助项目Ministry of Science and Technology of Taiwan[105-2112-M-007-003-MY3] ; Ministry of Science and Technology of Taiwan[108-2628-M-007-004-MY3] ; JSPS KAKENHI[19K03925] ; Spitzer/NASA grant RSA[1287913] ; Spanish MINECO[AYA2017-84089] ; National Natural Science Foundation of China[11673062]
项目资助者Ministry of Science and Technology of Taiwan[105-2112-M-007-003-MY3, 108-2628-M-007-004-MY3] ; JSPS KAKENHI[19K03925] ; Spitzer/NASA grant RSA[1287913] ; Spanish MINECO[AYA2017-84089] ; National Natural Science Foundation of China[11673062]
语种英语
学科领域天文学 ; 星系与宇宙学 ; 恒星与银河系 ; 恒星形成与演化
文章类型Article
出版者OXFORD UNIV PRESS
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS记录号WOS:000484349700045
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]GAMMA-RAY BURST ; MASS-METALLICITY RELATION ; C-II LINE ; FORMING GALAXIES ; LIGHT CURVES ; SIMPLE-MODEL ; 158 MICRON ; EMISSION ; DUST ; REDSHIFT
EI入藏号20221712013603
EI主题词Stars
EI分类号657.2 Extraterrestrial Physics and Stellar Phenomena - 703.2 Electric Filters - 716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/21156
专题南方基地
中国科学院天体结构与演化重点实验室
通讯作者Hashimoto, Tetsuya
作者单位1.Institute of Astronomy, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
2.Institute of Astronomy, Graduate School of Science, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
3.Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502, Japan
4.Research Center for Space and Cosmic Evolution, Ehime University, Matsuyama, Ehime 790-8577, Japan
5.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
6.SOKENDAI (The Graduate University for Advanced Studies), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
7.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, Yunnan Province, China
8.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
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GB/T 7714
Hashimoto, Tetsuya,Hatsukade, Bunyo,Goto, Tomotsugu,et al. Star-formation rates of two GRB host galaxies at z similar to 2 and a [Cii] deficit observed with ALMA[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,488(4):5029-5041.
APA Hashimoto, Tetsuya.,Hatsukade, Bunyo.,Goto, Tomotsugu.,Kim, Seong Jin.,Ohta, Kouji.,...&Mao JR.(2019).Star-formation rates of two GRB host galaxies at z similar to 2 and a [Cii] deficit observed with ALMA.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,488(4),5029-5041.
MLA Hashimoto, Tetsuya,et al."Star-formation rates of two GRB host galaxies at z similar to 2 and a [Cii] deficit observed with ALMA".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 488.4(2019):5029-5041.
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