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A pilot search for extragalactic OH absorption with FAST
Zheng, Zheng1; Li, Di1,2,3; Sadler, Elaine M.4,5,6; Allison, James R.6,7; Ningyu Tang1
2020-12-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume499Issue:3Pages:3085-3093
AbstractOH absorption is currently the only viable way to detect OH molecules in non-masing galaxies at cosmological distances. There have been only six such detections at z > 0.05 to date and so it is hard to put a statistically robust constraint on OH column densities in distant galaxies. We carried out a pilot OH absorption survey towards eight associated and one intervening HI 21-cm absorbers using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). We were able to constrain the OH abundance relative to HI ([OH]/[HI]) to be lower than 10(-6) similar to 10(-8) for redshifts Z is an element of [0.1919, 0.2241]. Although no individual detection was made, stacking three associated absorbers free of RFI provides a sensitive OH column density 3 sigma upper-limit similar to 1.57 x 10(14) (T-x(OH)/ 10 K)(1/f(c)(OH))cm(-2), which corresponds to a [OH]/[HI] < 5.45 x 10(-8). Combining with archival data, we show that associated absorbers have a slightly lower OH abundance than intervening absorbers. Our results are consistent with a trend of decreasing OH abundance with decreasing redshift.
KeywordISM: abundances galaxies: evolution galaxies: ISM quasars: absorption line radio lines: galaxies radio lines: ISM
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship
DOI10.1093/mnras/staa3033
WOS KeywordCOLD GAS ; CENTIMETER ABSORPTION ; ASTRONOMICAL DATA ; NEUTRAL HYDROGEN ; HI ABSORPTION ; REDSHIFT ; CLOUDS
Language英语
Funding ProjectNational Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11725313] ; National Natural Science Foundation of China[U1931110] ; National Natural Science Foundation of China[11703036] ; International Partnership Program of Chinese Academy of Sciences[114A11KYSB20160008] ; CAS Interdisciplinary Innovation Team[JCTD-2019-05] ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)[CE170100013] ; ACAMAR visiting fellowship
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; ACAMAR visiting fellowship ; ACAMAR visiting fellowship
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000593116100003
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80128
Collection中国科学院国家天文台
Corresponding AuthorZheng, Zheng; Li, Di
Affiliation1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa
4.Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia
5.CSIRO Astron & Space Sci, ATNF, POB 76, Epping, NSW 1710, Australia
6.ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Perth, WA, Australia
7.Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
Recommended Citation
GB/T 7714		 Zheng, Zheng,Li, Di,Sadler, Elaine M.,et al. A pilot search for extragalactic OH absorption with FAST[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,499(3):3085-3093.
APA Zheng, Zheng,Li, Di,Sadler, Elaine M.,Allison, James R.,&Ningyu Tang.(2020).A pilot search for extragalactic OH absorption with FAST.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,499(3),3085-3093.
MLA Zheng, Zheng,et al."A pilot search for extragalactic OH absorption with FAST".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 499.3(2020):3085-3093.
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