NAOC Open IR
Extragalactic H I 21-cm absorption line observations with the Five-hundred-meter Aperture Spherical radio Telescope
Zhang, Bo1,2; Zhu, Ming1,2; Wu, Zhong-Zu3; Yu, Qing-Zheng4; Jiang, Peng1,2; Yue, You-Ling1; Huang, Meng-Lin1,2; Hao, Qiao-Li1,2
2021-06-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume503Issue:4Pages:5385-5396
AbstractWe present a pilot study of extragalactic H I 21-cm absorption lines using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). We observed five continuum sources with H I absorption features first identified in the 40 per cent data release of the Arecibo Legacy Fast Arecibo L-Band Feed Array (ALFA) Survey (ALFALFA), including two systems later detected by the Westerbork Synthesis Radio Telescope (WSRT). Most of our observations were carried out during the FAST commissioning phase, and we have tested different observing modes, as well as data reduction methods, to produce the best spectra. Our observations successfully confirmed the existence of H I absorption lines in all these systems, including two sources that were marginally detected by ALFALFA. We fitted the H I profiles with single or double of Gaussian functions, and calculated the H I column densities of each source. The H I absorption profiles obtained by FAST show much higher spectral resolution and higher SNR ratio than the existing data in the literature, thus demonstrating the power of FAST in revealing detailed structures of H I absorption lines. Our pilot observations and tests have enabled us to develop a strategy to search for H I absorption sources using the data from the FAST extragalactic H I survey, which is one of the key projects undertaken at FAST. We expect that over 1500 extragalactic H I absorbing systems could be detected with survey data, based on sensitivity level that we achieved in pilot observations.
Keywordline: identification line: profiles radio continuum: galaxies radio lines: galaxies
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC)
DOI10.1093/mnras/stab754
WOS KeywordFAST ALPHA SURVEY ; NEUTRAL HYDROGEN ; OH ABSORPTION ; 21 CM ; GALAXIES ; SEARCH ; DETECTIONS ; SKY
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFA0402600] ; National Natural Science Foundation of China[11903056] ; National Natural Science Foundation of China[11763002] ; National Natural Science Foundation of China (NSFC)[U1731125] ; National Natural Science Foundation of China (NSFC)[U1531246] ; National Natural Science Foundation of China (NSFC)[U1931203] ; Chinese Academy of Sciences (CAS)[U1731125] ; Chinese Academy of Sciences (CAS)[U1531246] ; Chinese Academy of Sciences (CAS)[U1931203] ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC)
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMSCAS ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC) ; Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences (NAOC)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000649001600048
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77719
Collection中国科学院国家天文台
Corresponding AuthorZhang, Bo; Zhu, Ming
Affiliation1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab Fast, Beijing 100101, Peoples R China
3.Guizhou Univ, Coll Phys, Guiyang 550025, Peoples R China
4.Xiamen Univ, Dept Astron, Xiamen 361005, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Bo,Zhu, Ming,Wu, Zhong-Zu,et al. Extragalactic H I 21-cm absorption line observations with the Five-hundred-meter Aperture Spherical radio Telescope[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,503(4):5385-5396.
APA Zhang, Bo.,Zhu, Ming.,Wu, Zhong-Zu.,Yu, Qing-Zheng.,Jiang, Peng.,...&Hao, Qiao-Li.(2021).Extragalactic H I 21-cm absorption line observations with the Five-hundred-meter Aperture Spherical radio Telescope.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,503(4),5385-5396.
MLA Zhang, Bo,et al."Extragalactic H I 21-cm absorption line observations with the Five-hundred-meter Aperture Spherical radio Telescope".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 503.4(2021):5385-5396.
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