| DISCOVERY OF 14 NEW SLOWLY PULSATING B STARS IN THE OPEN CLUSTER NGC 7654 | |
Luo YP(罗杨平)1,2,3 ; Zhang, XB4; Deng, LC4; Han ZW(韩占文)1,2; Luo, YP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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| 2012-02-10 | |
| 卷号 | 746期号:1 |
| DOI | 10.1088/2041-8205/746/1/L7 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Open Clusters And Associations: Individual (Ngc 7654) Stars: Oscillations Stars: Variables: General Techniques: Photometric |
| 摘要 | We carried out time-series BV CCD photometric observations of the open cluster NGC 7654 (Messier 52) to search for variable stars. Eighteen slowly pulsating B (SPB) stars have been detected, among which 14 candidates are newly discovered, three known ones are confirmed, and a previously found delta Scuti star is also identified as an SPB candidate. Twelve SPBs are probable cluster members based on membership analysis. This makes NGC 7654 the richest galactic open cluster in terms of SPB star content. It is also a new discovery that NGC 7654 hosts three gamma Dor star candidates. We found that all these stars (18 SPB and 3 gamma Dor stars) have periods longer than their corresponding fundamental radial mode. With such a big sample of g-mode pulsators in a single cluster, it is clear that multi-mode pulsation is more common in the upper part of the main sequence than in the lower part. All the stars span a narrow strip on the period-luminosity plane, which also includes the gamma Dor stars at the low-luminosity extension. This result implies that there may be a single period-luminosity relation applicable to all g-mode main-sequence pulsators. As a by-product, three EA-type eclipsing binaries and an EW-type eclipsing binary are also discovered. |
| 项目资助者 | National Natural Science Foundation of China [10821061, 11033008, 11103073] ; National Basic Research Program of China [2007CB815406] ; Chinese Academy of Sciences [KJCX2-YW-T24] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 2041-8205 |
| URL | 查看原文 |
| 归档日期 | 2012-03-12 |
| WOS记录号 | WOS:000300323500007 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | VARIABLE-STARS ; FIELD ; PHOTOMETRY ; NGC-188 ; SEARCH |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4542 |
| 专题 | 大样本恒星演化研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Luo, YP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, 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.Graduate University of Chinese Academy of Sciences, Beijing 100049, China 4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Luo YP,Zhang, XB,Deng, LC,et al. DISCOVERY OF 14 NEW SLOWLY PULSATING B STARS IN THE OPEN CLUSTER NGC 7654[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,746(1). |
| APA | Luo YP,Zhang, XB,Deng, LC,Han ZW,&Luo, YP .(2012).DISCOVERY OF 14 NEW SLOWLY PULSATING B STARS IN THE OPEN CLUSTER NGC 7654.ASTROPHYSICAL JOURNAL LETTERS,746(1). |
| MLA | Luo YP,et al."DISCOVERY OF 14 NEW SLOWLY PULSATING B STARS IN THE OPEN CLUSTER NGC 7654".ASTROPHYSICAL JOURNAL LETTERS 746.1(2012). |
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| DISCOVERY OF 14 NEW （476KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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