ASTEROSEISMIC STUDY ON CLUSTER DISTANCE MODULI FOR RED GIANT BRANCH STARS IN NGC 6791 AND NGC 6819
文献类型：期刊论文
| 作者 | Wu T(吴涛)1,2,3 ; Li Y(李焱)1,2; Hekker, S4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-05-01 |
| 卷号 | 786期号:1页码:10-19 |
| 关键词 | asteroseismology open clusters and associations: individual (NGC 6791, NGC 6819) stars: distances stars: fundamental parameters stars: late-type stars: oscillations |
| ISSN号 | 0004-637X |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Wu, T (reprint author), Chinese Acad Sci, Yunnan Observatories, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | Stellar distance is an important basic parameter in stellar astrophysics. Stars in a cluster are thought to be formed coevally from the same interstellar cloud of gas and dust; therefore, they are expected to have common properties. These common properties strengthen our ability to constrain theoretical models and/or to determine fundamental parameters, such as stellar mass, metal fraction, and distance, when tested against an ensemble of cluster stars. Here we derive a new relation based on solar-like oscillations, photometric observations, and the theory of stellar structure and evolution of red giant branch stars to determine cluster distance moduli through the global oscillation parameters Δν and νmax and photometric data V. The values of Δν and νmax are derived from Keplerobservations. At the same time, it is used to interpret the trends between V and Δν. From the analyses of this newly derived relation and observational data of NGC 6791 and NGC 6819, we devise a method in which all stars in a cluster are regarded as one entity to determine the cluster distance modulus. This approach fully reflects the characteristic of member stars in a cluster as a natural sample. From this method we derive true distance moduli of 13.09 ± 0.10 mag for NGC 6791 and 11.88 ± 0.14 mag for NGC 6819. Additionally, we find that the distance modulus only slightly depends on the metallicity [Fe/H] in the new relation. A change of 0.1 dex in [Fe/H] will lead to a change of 0.06 mag in the distance modulus. |
| 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] | SOLAR-LIKE OSCILLATIONS ; GRAVITATIONAL LENSING EXPERIMENT. ; COLOR-MAGNITUDE DIAGRAMS ; DWARF COOLING SEQUENCE ; SMALL-MAGELLANIC-CLOUD ; OGLE-III CATALOG ; ECLIPSING BINARY ; CCD PHOTOMETRY ; METAL-RICH ; BOLOMETRIC CORRECTIONS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-637X/786/1/10/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000335810700010 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5240]  |
| 专题 | 云南天文台_恒星物理研究组 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, P.O. Box 110, Kunming 650011, China 2.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China 3.University of Chinese Academy of Sciences, Beijing 100039, China 4.Max Planck Institute for Solar System Research, Justus von Liebig Weg 3, D-37077 Göttingen, Germany |
| 推荐引用方式 GB/T 7714 | Wu T,Li Y,Hekker, S. ASTEROSEISMIC STUDY ON CLUSTER DISTANCE MODULI FOR RED GIANT BRANCH STARS IN NGC 6791 AND NGC 6819[J]. ASTROPHYSICAL JOURNAL,2014,786(1):10-19. |
| APA | Wu T,Li Y,&Hekker, S.(2014).ASTEROSEISMIC STUDY ON CLUSTER DISTANCE MODULI FOR RED GIANT BRANCH STARS IN NGC 6791 AND NGC 6819.ASTROPHYSICAL JOURNAL,786(1),10-19. |
| MLA | Wu T,et al."ASTEROSEISMIC STUDY ON CLUSTER DISTANCE MODULI FOR RED GIANT BRANCH STARS IN NGC 6791 AND NGC 6819".ASTROPHYSICAL JOURNAL 786.1(2014):10-19. |
入库方式： OAI收割
来源：云南天文台
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