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M101: Spectral Observations of H II Regions and Their Physical Properties
Hu, Ning1,2; Wang, Enci1,2; Lin, Zesen1,2; Kong, Xu1,2; Cheng, Fuzhen1,2; Fan, Zou3; Fang, Guangwen4; Lin, Lin5; Mao, Yewei6; Wang, Jing7; Zhou, Xu3; Zhou, Zhiming3; Zhu, Yinan3; Zou, Hu3
2018-02-10
发表期刊ASTROPHYSICAL JOURNAL
卷号854期号:1
摘要By using the Hectospec 6.5 m Multiple Mirror Telescope and the 2.16 m telescope of the National Astronomical Observatories, of the Chinese Academy of Sciences, we obtained 188 high signal-to-noise ratio spectra of H II regions in the nearby galaxy M101, which is the largest spectroscopic sample of H II regions for this galaxy so far. These spectra cover a wide range of regions on M101, which enables us to analyze two-dimensional distributions of its physical properties. The physical parameters are derived from emission lines or stellar continua, including stellar population age, electron temperature, oxygen abundance, etc. The oxygen abundances are derived using two empirical methods based on O3N2 and R-23 indicators, as well as the direct T-e method when [O III] lambda 4363 is available. By applying the harmonic decomposition analysis to the velocity field, we obtained a line-of-sight rotation velocity of 71 km s(-1) and a position angle of 36 degrees. The stellar age profile shows an old stellar population in the galaxy center and a relatively young stellar population in outer regions, suggesting an old bulge and a young disk. The oxygen abundance profile exhibits a clear break at similar to 18 kpc, with a gradient of -0.0364 dex kpc(-1) in the inner region and -0.00686 dex kpc(-1) in the outer region. Our results agree with the "inside-out" disk growth scenario of M101.
文章类型Article
关键词Galaxies: Evolution Galaxies: Fundamental Parameters Galaxies: Individual (M101) Galaxies: Stellar Content
WOS标题词Science & Technology ; Physical Sciences
资助者National Astronomical Observatories of China ; National Astronomical Observatories of China ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Ministry of Finance ; Ministry of Finance ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Natural Science Foundation of China (NSFC)(11320101002 ; National Natural Science Foundation of China (NSFC)(11320101002 ; University of Science and Technology of China(WK2030220019) ; University of Science and Technology of China(WK2030220019) ; 11421303 ; 11421303 ; 11433005) ; 11433005) ; National Astronomical Observatories of China ; National Astronomical Observatories of China ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Ministry of Finance ; Ministry of Finance ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Natural Science Foundation of China (NSFC)(11320101002 ; National Natural Science Foundation of China (NSFC)(11320101002 ; University of Science and Technology of China(WK2030220019) ; University of Science and Technology of China(WK2030220019) ; 11421303 ; 11421303 ; 11433005) ; 11433005)
DOI10.3847/1538-4357/aaa6ca
关键词[WOS]MASS-METALLICITY RELATION ; STAR-FORMING GALAXIES ; SPIRAL GALAXIES ; ABUNDANCE GRADIENTS ; MILKY-WAY ; SAURON PROJECT ; HII-REGIONS ; GAS-FLOWS ; COSMOLOGICAL SIMULATIONS ; TRANSITION-PROBABILITIES
收录类别SCI
语种英语
资助者National Astronomical Observatories of China ; National Astronomical Observatories of China ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Ministry of Finance ; Ministry of Finance ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Natural Science Foundation of China (NSFC)(11320101002 ; National Natural Science Foundation of China (NSFC)(11320101002 ; University of Science and Technology of China(WK2030220019) ; University of Science and Technology of China(WK2030220019) ; 11421303 ; 11421303 ; 11433005) ; 11433005) ; National Astronomical Observatories of China ; National Astronomical Observatories of China ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Chinese Academy of Sciences (the Strategic Priority Research Program, "The Emergence of Cosmological Structures")(XDB09000000) ; Ministry of Finance ; Ministry of Finance ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Basic Research Program of China (973 Program)(2015CB857004) ; National Natural Science Foundation of China (NSFC)(11320101002 ; National Natural Science Foundation of China (NSFC)(11320101002 ; University of Science and Technology of China(WK2030220019) ; University of Science and Technology of China(WK2030220019) ; 11421303 ; 11421303 ; 11433005) ; 11433005)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000425000100008
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20303
专题光学天文研究部
作者单位1.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China
4.Dali Univ, Inst Astron & Hist Sci & Technol, Dali 671003, Peoples R China
5.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
6.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
7.CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia
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Hu, Ning,Wang, Enci,Lin, Zesen,et al. M101: Spectral Observations of H II Regions and Their Physical Properties[J]. ASTROPHYSICAL JOURNAL,2018,854(1).
APA Hu, Ning.,Wang, Enci.,Lin, Zesen.,Kong, Xu.,Cheng, Fuzhen.,...&Zou, Hu.(2018).M101: Spectral Observations of H II Regions and Their Physical Properties.ASTROPHYSICAL JOURNAL,854(1).
MLA Hu, Ning,et al."M101: Spectral Observations of H II Regions and Their Physical Properties".ASTROPHYSICAL JOURNAL 854.1(2018).
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