When Does the Onset of Multiple Stellar Populations in Star Clusters Occur? III. No Evidence of Significant Chemical Variations in Main-sequence Stars of NGC 419
文献类型：期刊论文
| 作者 | Li, Chengyuan1; Wang, Yue2; Tang, Baitian1; Milone, Antonino P.3,4; Yang, Yujiao5; Ji, Xin2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2020-04-10 |
| 卷号 | 893期号:1页码:8 |
| ISSN号 | 0004-637X |
| 关键词 | Globular star clusters Hertzsprung Russell diagram G dwarf stars K dwarf stars Stellar populations |
| DOI | 10.3847/1538-4357/ab7b64 |
| 英文摘要 | Recent studies have revealed that the onset age for the presence of multiple stellar populations (MPs) in star clusters seems to correspond to the disappearance of the extended main-sequence turnoff in young clusters, a pattern associated with stellar rotations. A speculative suggestion is that MPs might be caused by the magnetic brake, a stellar evolutionary effect linked to rotation. In this work, we use the young massive cluster NGC 419 as a testbed. We examined if its magnetically baked MS stars would exhibit MPs. Using the deep ultraviolet and visible images observed through the Hubble Space Telescope, combined with a specific color index that is sensitive to the nitrogen (N) abundance, we examined if its late G- and K-type MS stars are affected by N variation. Our analysis reports that the morphology of its GK-type MS is most likely a simple stellar population, and only a negligible probability, which indicates a N variation up to 0.4 dex is present. We therefore conclude that there is no significant N variation among its GK-type MS stars. The absence of a significant chemical variation among the late-type MS stars indicates that MPs might not be a specific pattern of magnetically braked stars. |
| WOS关键词 | MAGELLANIC CLOUD CLUSTERS ; GALACTIC GLOBULAR-CLUSTERS ; UV LEGACY SURVEY ; NITROGEN ABUNDANCES ; AGE ; ROTATION ; SEARCH ; I. |
| 资助项目 | NASA[NAS 5-26555] ; One-HundredTalent project of Sun Yat-sen University ; National Natural Science Foundation of China[U1931102] ; National Natural Science Foundation of China[11803048] ; European Research Council (ERC) under the European Union[716082] ; MIUR through the FARE project[R164RM93XW] ; MIUR through the PRIN program[2017Z2HSMF] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000526720100001 |
| 资助机构 | NASA ; NASA ; One-HundredTalent project of Sun Yat-sen University ; One-HundredTalent project of Sun Yat-sen University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; MIUR through the FARE project ; MIUR through the FARE project ; MIUR through the PRIN program ; MIUR through the PRIN program ; NASA ; NASA ; One-HundredTalent project of Sun Yat-sen University ; One-HundredTalent project of Sun Yat-sen University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; MIUR through the FARE project ; MIUR through the FARE project ; MIUR through the PRIN program ; MIUR through the PRIN program ; NASA ; NASA ; One-HundredTalent project of Sun Yat-sen University ; One-HundredTalent project of Sun Yat-sen University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; MIUR through the FARE project ; MIUR through the FARE project ; MIUR through the PRIN program ; MIUR through the PRIN program ; NASA ; NASA ; One-HundredTalent project of Sun Yat-sen University ; One-HundredTalent project of Sun Yat-sen University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; MIUR through the FARE project ; MIUR through the FARE project ; MIUR through the PRIN program ; MIUR through the PRIN program |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/56011]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Li, Chengyuan |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100101, Peoples R China 3.Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Vicolo Osservatorio 3, IT-35122 Padua, Italy 4.Ist Nazl Astrofis, Osservatorio Astron Padova, Vicolo Osservatorio 5, IT-35122 Padua, Italy 5.Peking Univ, Dept Astron, Sch Phys, Yi He Yuan Lu 5, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Chengyuan,Wang, Yue,Tang, Baitian,et al. When Does the Onset of Multiple Stellar Populations in Star Clusters Occur? III. No Evidence of Significant Chemical Variations in Main-sequence Stars of NGC 419[J]. ASTROPHYSICAL JOURNAL,2020,893(1):8. |
| APA | Li, Chengyuan,Wang, Yue,Tang, Baitian,Milone, Antonino P.,Yang, Yujiao,&Ji, Xin.(2020).When Does the Onset of Multiple Stellar Populations in Star Clusters Occur? III. No Evidence of Significant Chemical Variations in Main-sequence Stars of NGC 419.ASTROPHYSICAL JOURNAL,893(1),8. |
| MLA | Li, Chengyuan,et al."When Does the Onset of Multiple Stellar Populations in Star Clusters Occur? III. No Evidence of Significant Chemical Variations in Main-sequence Stars of NGC 419".ASTROPHYSICAL JOURNAL 893.1(2020):8. |
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来源：国家天文台
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