CZ Aqr: An Oscillating Eclipsing Algol-type System Composed of a δ Sct Primary Star and a Subgiant Star in a Quadruple System
文献类型：期刊论文
| 作者 | Ceng QH(曾崎环)3,4 ; Liao WP(廖文萍)3,4; Qian, Sheng-Bang1,2; Li LJ(李临甲)4; Li P(李平)3,4; Deng ZL(邓兆龙)3,4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2024-11-01 |
| 卷号 | 975期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad83b2 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Eclipsing Algol-type systems containing a delta Scuti (hereafter delta Sct) star enable precise determination of physical parameters and the investigation of stellar internal structure and evolution. We present the absolute parameters of CZ Aquarius (hereafter CZ Aqr) based on TESS data. CZ Aqr has an orbital period of 0.86275209 day, a mass ratio of 0.489 (6), and the secondary component nearly fills its Roche lobe. O - C analysis reveals a downward parabolic trend and a cyclical variation with a period of 88.2 yr. The downward parabola suggests a long-term decrease in the orbital period with P = -3.09 x 10-8 days yr-1. The mass loss rate is estimated to be 4.54 x 10-9 M circle dot yr-1, which is possibly due to magnetic stellar wind or a hot spot. The cyclical variation might be caused by the light travel time effect via the presence of a third body with a minimum mass of M3min = 0.312 (21) M circle dot. Additionally, there are two possible celestial bodies in a 2:7 resonance orbit around CZ Aqr. The asymmetric light curve is explained by adding a hot spot on the surface of the primary star. After removing the binary model, 26 frequencies were extracted from TESS data. Two radial modes were newly identified among three possible independent frequencies. Our results show that the eclipsing Algol-type system is composed of a delta Sct primary star and a subgiant star in a quadruple system. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | CONTACT BINARY ; PERIOD CHANGES ; MASS-TRANSFER ; COMPONENTS ; PULSATION ; PARAMETERS ; FREQUENCY ; COMPANION ; LIGHT ; WELL |
| 资助项目 | International Cooperation Projects of the National Key RD Program[2022YFE0127300]; International Cooperation Projects of the National Key RD Program[11933008]; National Natural Science Foundation of China; Young Talent Project of Yunnan Revitalization Talent Support Program in Yunnan Province[202201AT070092]; Basic research project of Yunnan Province; Space Telescope Science Institute (STScI); NASA Office of Space Science; NASA Explorer Program; Gaia Data Processing and Analysis Consortium |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001349925400001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | International Cooperation Projects of the National Key RD Program[2022YFE0127300] ; International Cooperation Projects of the National Key RD Program[11933008] ; National Natural Science Foundation of China ; Young Talent Project of Yunnan Revitalization Talent Support Program in Yunnan Province[202201AT070092] ; Basic research project of Yunnan Province ; Space Telescope Science Institute (STScI) ; NASA Office of Space Science ; NASA Explorer Program ; Gaia Data Processing and Analysis Consortium |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27792]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, 650091 Kunming, People's Republic of China 2.Department of Astronomy, School of Physics and Astronomy, Yunnan University, 650091 Kunming, People's Republic of China; 3.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, 101408 Beijing, People's Republic of China; 4.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, 650216 Yunnan, People's Republic of China; liaowp@ynao.ac.cn; |
| 推荐引用方式 GB/T 7714 | Ceng QH,Liao WP,Qian, Sheng-Bang,et al. CZ Aqr: An Oscillating Eclipsing Algol-type System Composed of a δ Sct Primary Star and a Subgiant Star in a Quadruple System[J]. ASTROPHYSICAL JOURNAL,2024,975(2). |
| APA | 曾崎环,廖文萍,Qian, Sheng-Bang,李临甲,李平,&邓兆龙.(2024).CZ Aqr: An Oscillating Eclipsing Algol-type System Composed of a δ Sct Primary Star and a Subgiant Star in a Quadruple System.ASTROPHYSICAL JOURNAL,975(2). |
| MLA | 曾崎环,et al."CZ Aqr: An Oscillating Eclipsing Algol-type System Composed of a δ Sct Primary Star and a Subgiant Star in a Quadruple System".ASTROPHYSICAL JOURNAL 975.2(2024). |
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来源：云南天文台
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