NAOC Open IR
The atomic gas of star-forming galaxies at z similar to 0.05 as revealed by the Five-hundred-meter Aperture Spherical Radio Telescope
Cheng, Cheng1,2,3; Ibar, Edo4; Du, Wei2,3; Molina, Juan5,6,7; Orellana-Gonzales, Gustavo8,9; Zhang, Bo2; Zhu, Ming2; Xu, Cong Kevin1,2,3; Wu, Shumei1,2,3; Cao, Tianwen1,2,3; Huang, Jia-Sheng1,2,3; Leiton, Roger9; Hughes, Thomas M.1,4,10,11; He, Chuan1,2,3; Li, Zijian1,2,3; Xu, Hai1,2,3; Dai, Y. Sophia1,2,3; Shao, Xu1,2,3; Musin, Marat1,2,3
2020-06-29
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume638Pages:7
AbstractContext. We report new HI observations of four z similar to 0.05 VALES galaxies undertaken during the commissioning phase of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST).Aims. FAST is the largest single-dish telescope in the world, with a 500 m aperture and a 19-Beam receiver. Exploiting the unprecedented sensitivity provided by FAST, we aim to study the atomic gas content, via the HI 21 cm emission line, in low-z star formation galaxies taken from the Valparaiso ALMA/APEX Line Emission Survey (VALES). Together with previous Atacama Large Millimeter/submillimeter Array (ALMA) CO(J=1-0) observations, the HI data provides crucial information to measure the gas mass and dynamics.Methods. As a pilot HI galaxy survey, we targeted four local star-forming galaxies at z similar to 0.05. In particular, one of them has already been detected in HI by the Arecibo Legacy Fast ALFA survey (ALFALFA), allowing a careful comparison. We use an ON-OFF observing approach that allowed us to reach an rms of 0.7 mJy beam(-1) at a 1.7 km s(-1) velocity resolution within only 20 min ON-target integration time.Results. In this Letter, we demonstrate the extraordinary capability of the FAST 19-beam receiver to push the detectability of the HI emission line of extra-galactic sources. The HI emission line detected by FAST shows good consistency with the previous Arecibo telescope ALFALFA results. Our observations are put into context with previous multi-wavelength data to reveal the physical properties of these low-z galaxies. We find that the CO(J=1-0) and HI emission line profiles are similar. The dynamical mass estimated from the HI data is an order of magnitude higher than the baryon mass and the dynamical mass derived from the CO observations, implying that the mass probed by dynamics of HI is dominated by the dark matter halo. In one case, a target shows an excess of CO(J=1-0) in the line centre, which can be explained by an enhanced CO(J=1-0) emission induced by a nuclear starburst showing high-velocity dispersion.
Keywordgalaxies: evolution galaxies: ISM galaxies: star formation galaxies: starburst radio lines: galaxies
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D 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) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D 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) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D 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) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1051/0004-6361/202038483
WOS KeywordTULLY-FISHER RELATION ; H-ATLAS GALAXIES ; ALL-SKY-SURVEY ; HIPASS CATALOG ; COLD GAS ; VALES ; DESIGN ; GAMA
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[11803044] ; National Natural Science Foundation of China (NSFC)[11673028] ; NSFC[11903056] ; NSFC[11933003] ; NSFC[U1931109] ; NSFC[11733006] ; Chinese Academy of Sciences (CAS) ; FONDECYT[1171710] ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China[11721303] ; National Science Foundation of China[11991052] ; National Key R&D Program of China[2016YFA0400702] ; National Key R&D Program of China[2017YFA0402704] ; National Natural Science Foundation of China[11733006] ; National Natural Science Foundation of China[11873055]
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D 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) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D 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) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D 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) ; NSFC ; NSFC ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; FONDECYT ; FONDECYT ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Commission for Scientific and Technological Research of Chile (CONICYT) ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000550003500001
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82637
Collection中国科学院国家天文台
Corresponding AuthorCheng, Cheng
Affiliation1.Chinese Acad Sci, South Amer Ctr Astron, Natl Astron Observ, Beijing 100101, Peoples R China
2.Chinese Acad Sci NAOC, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab Opt Astron, Beijing 100101, Peoples R China
4.Univ Valparaiso, Inst Fis & Astron, Avda Gran Bretana 1111, Valparaiso, Chile
5.Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
6.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
7.Univ Chile, Dept Astron DAS, Casilla 36, Santiago, Chile
8.Univ Catolica Santisima Concepcion, Dept Matemat & Fis Aplicadas, Alonso de Ribera 2850, Concepcion, Chile
9.Univ Concepcion, Dept Astron, Casilla 160, Concepcion, Chile
10.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China
11.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Cheng,Ibar, Edo,Du, Wei,et al. The atomic gas of star-forming galaxies at z similar to 0.05 as revealed by the Five-hundred-meter Aperture Spherical Radio Telescope[J]. ASTRONOMY & ASTROPHYSICS,2020,638:7.
APA Cheng, Cheng.,Ibar, Edo.,Du, Wei.,Molina, Juan.,Orellana-Gonzales, Gustavo.,...&Musin, Marat.(2020).The atomic gas of star-forming galaxies at z similar to 0.05 as revealed by the Five-hundred-meter Aperture Spherical Radio Telescope.ASTRONOMY & ASTROPHYSICS,638,7.
MLA Cheng, Cheng,et al."The atomic gas of star-forming galaxies at z similar to 0.05 as revealed by the Five-hundred-meter Aperture Spherical Radio Telescope".ASTRONOMY & ASTROPHYSICS 638(2020):7.
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