V1224 Cas: An EL CVn-type Eclipsing Binary Consisting of a Helium White Dwarf Precursor and a Delta Scuti Pulsator
文献类型：期刊论文
| 作者 | Wang, Kun1; Luo, Changqing2; Zhang, Xiaobin2; Zhang, Bo2; Deng, Licai1,2; Luo, Zhiquan1 |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2018-11-01 |
| 卷号 | 156期号:5页码:7 |
| 关键词 | binaries: eclipsing stars: individual (V1224 Cas) stars: variables: delta Scuti |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/aade52 |
| 英文摘要 | We report the discovery of a new eclipsing EL CVn-type binary, consisting of a delta Sct-type pulsator and a thermally bloated low-mass pre-He white dwarf (WD). Spectroscopy and time-series BV photometry of V1224 Cas were carried out. The spectroscopy reveals a spectral type of A3 for the star. Light curve modeling indicates that V1224 Cas is a short-period detached system containing a possible low-mass WD with an effective temperature of about 9516 K. Based on the effective temperature and the surface gravity of the A-type primary star from the spectroscopic results, the absolute parameters of the components were estimated as: M-p = 2.16 +/- 0.22M(circle dot), Rp = 3.54 +/- 0.12R(circle dot), L-p = 55.9 +/- 6.9L(circle dot), M-s = 0.19 +/- 0.02M(circle dot), R-s = 0.97 +/- 0.04R(circle dot), and L-s = 6.9 +/- 0.6L(circle dot). We therefore introduce V1224 Cas as a new EL CVn-type binary candidate. The light curves in both filters all show multi-periodic pulsations, superimposed on binary effects. We performed a preliminary frequency analysis of the light residuals after removing the synthetic eclipsing curve from the original observational data. The results suggest that the rapid light variations among the light curves could be attributed to the delta Sct-type primary component. We therefore conclude that V1224 Cas is very likely a WD-delta Sct binary. |
| WOS关键词 | MULTI-PERIODIC PULSATIONS ; CLUSTER NGC 7789 ; RED-GIANT STAR ; LIGHT CURVES ; PHOTOMETRY ; SYSTEM |
| 资助项目 | China Scholarship Council ; Meritocracy Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Beijing Natural Science Foundation[1184018] ; National Natural Science Foundation of China[11833002] ; National Natural Science Foundation of China[11633005] ; National Natural Science Foundation of China[11473037] ; National Natural Science Foundation of China[11373037] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000446797700004 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | China Scholarship Council ; China Scholarship Council ; Meritocracy Research Funds of China West Normal University ; Meritocracy Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; Meritocracy Research Funds of China West Normal University ; Meritocracy Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; Meritocracy Research Funds of China West Normal University ; Meritocracy Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; Meritocracy Research Funds of China West Normal University ; Meritocracy Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Fundamental Research Funds of China West Normal University ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/23034]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Wang, Kun |
| 作者单位 | 1.China West Normal Univ, Dept Astron, Nanchong 637002, Peoples R China 2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Kun,Luo, Changqing,Zhang, Xiaobin,et al. V1224 Cas: An EL CVn-type Eclipsing Binary Consisting of a Helium White Dwarf Precursor and a Delta Scuti Pulsator[J]. ASTRONOMICAL JOURNAL,2018,156(5):7. |
| APA | Wang, Kun,Luo, Changqing,Zhang, Xiaobin,Zhang, Bo,Deng, Licai,&Luo, Zhiquan.(2018).V1224 Cas: An EL CVn-type Eclipsing Binary Consisting of a Helium White Dwarf Precursor and a Delta Scuti Pulsator.ASTRONOMICAL JOURNAL,156(5),7. |
| MLA | Wang, Kun,et al."V1224 Cas: An EL CVn-type Eclipsing Binary Consisting of a Helium White Dwarf Precursor and a Delta Scuti Pulsator".ASTRONOMICAL JOURNAL 156.5(2018):7. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。