Radiation fields of intermediate-age stellar populations with binaries as ionizing sources of H II regions
文献类型：期刊论文
| 作者 | Zhang FH(张奉辉)1,2 ; Li LF(李立芳)1,2; Cheng LT(程连涛)1,2,3; Wang L(王浪)1,2,3; Kang XY(康晓宇)1,2,3; Zhuang YL(庄宇龙)1,2,3; Han ZW(韩占文)1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2015-02-11 |
| 卷号 | 447期号:1页码:L21-L25 |
| 关键词 | binaries: general H II regions galaxies: abundances galaxies: star formation |
| ISSN号 | 0035-8711 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Zhang, F (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | Radiation fields emitted by O- and B-type stars or young stellar populations (SPs) are generally considered as significant central ionizing sources (CISs) of classic H II regions. In our previous studies, we showed that the inclusion of binary interactions in stellar population synthesis models can significantly increase the ultraviolet spectrum hardness and the number of ionizing photons of intermediate-age (IA) SPs (7 less than or similar to log(t/yr) less than or similar to 8). In this work, we present photoionization models of H II regions ionized by radiation fields emitted by IA SPs, including binary systems, and show that these fields are in theory possible candidates for significant CISs of classic H II regions. When radiation fields of IA SPs comprising binary systems are used as the CISs of classic H II regions, the theoretical strengths of a number of lines (such as [O III] lambda 4959', [ S II] lambda 6716', etc.), which are weaker than observations, are increased; the border or selection-criterion lines between star-forming galaxies and active galactic nuclei (AGNs) in the diagnostic diagrams (for example, [N II] lambda 6583/H alpha versus [O III] lambda 5007/H beta), move into the region occupied originally by AGNs; and the He II lambda 1640 line, observed in Lyman break and high-redshift gravitationally lensed galaxies, also can be produced. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPECTRAL ENERGY-DISTRIBUTION ; DIGITAL SKY SURVEY ; EXTRAGALACTIC HII-REGIONS ; DWARF IRREGULAR GALAXIES ; EMISSION-LINE GALAXIES ; STARBURST GALAXIES ; CHEMICAL-COMPOSITION ; INTERSTELLAR-MEDIUM ; ABUNDANCE GRADIENT ; PLANETARY-NEBULAE |
| 收录类别 | SCI |
| 原文出处 | http://mnrasl.oxfordjournals.org/content/447/1/L21 |
| 语种 | 英语 |
| WOS记录号 | WOS:000360552300005 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4601]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China 3.University of Chinese Academy of Sciences, Beijing, 100049, China |
| 推荐引用方式 GB/T 7714 | Zhang FH,Li LF,Cheng LT,et al. Radiation fields of intermediate-age stellar populations with binaries as ionizing sources of H II regions[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,447(1):L21-L25. |
| APA | Zhang FH.,Li LF.,Cheng LT.,Wang L.,Kang XY.,...&Han ZW.(2015).Radiation fields of intermediate-age stellar populations with binaries as ionizing sources of H II regions.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,447(1),L21-L25. |
| MLA | Zhang FH,et al."Radiation fields of intermediate-age stellar populations with binaries as ionizing sources of H II regions".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447.1(2015):L21-L25. |
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来源：云南天文台
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