Spectroscopic Observation and Analysis of HII Regions in M33 with MMT: Temperatures and Oxygen Abundances
文献类型：期刊论文
| 作者 | Lin, Zesen2,3; Hu, Ning2,3; Kong, Xu2,3; Gao, Yulong2,3; Zou, Hu4; Wang, Enci2,3; Cheng, Fuzhen2,3; Fang, Guanwen5; Lin, Lin6; Wang, Jing1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-06-20 |
| 卷号 | 842期号:2 |
| 关键词 | Galaxies: Abundances Galaxies: Evolution Galaxies: Individual (M33) Galaxies: Ism Galaxies: Spiral h Ii Regions |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa6f14 |
| 英文摘要 | The spectra of 413 star-forming (or H II) regions in M33 (NGC 598) were observed using the multifiber spectrograph of Hectospec at the 6.5 m Multiple Mirror Telescope. Using this homogeneous spectra sample, we measured the intensities of emission lines and some physical parameters, such as electron temperatures, electron densities, and metallicities. Oxygen abundances were derived via the direct method (when available) and two empirical strong-line methods, namely, O3N2 and N2. At the high-metallicity end, oxygen abundances derived from the O3N2 calibration were higher than those derived from the N2 index, indicating an inconsistency between O3N2 and N2 calibrations. We present a detailed analysis of the spatial distribution of gas-phase oxygen abundances in M33 and confirm the existence of the axisymmetric global metallicity distribution that is widely assumed in the literature. Local variations were also observed and subsequently associated with spiral structures to provide evidence of radial migration driven by arms. Our O/H gradient fitted out to 1.1 R-25 resulted in slopes of -0.17 +/- 0.03, -0.19 +/- 0.01, and -0.16 +/- 0.17 dex R-25(-1), utilizing abundances from O3N2, N2 diagnostics, and a direct method, respectively. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000403655500004 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.226.72/handle/331011/32617]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Lin, Zesen |
| 作者单位 | 1.CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia 2.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China 3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Dali Univ, Inst Astron & Hist Sci & Technol, Dali 671003, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Zesen,Hu, Ning,Kong, Xu,et al. Spectroscopic Observation and Analysis of HII Regions in M33 with MMT: Temperatures and Oxygen Abundances[J]. ASTROPHYSICAL JOURNAL,2017,842(2). |
| APA | Lin, Zesen.,Hu, Ning.,Kong, Xu.,Gao, Yulong.,Zou, Hu.,...&Wang, Jing.(2017).Spectroscopic Observation and Analysis of HII Regions in M33 with MMT: Temperatures and Oxygen Abundances.ASTROPHYSICAL JOURNAL,842(2). |
| MLA | Lin, Zesen,et al."Spectroscopic Observation and Analysis of HII Regions in M33 with MMT: Temperatures and Oxygen Abundances".ASTROPHYSICAL JOURNAL 842.2(2017). |
入库方式： OAI收割
来源：上海天文台
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