Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation
文献类型:期刊论文
作者 | Li LJ(李临甲)2,3; Qian SB(钱声帮)1,2,3; Shi XD(施相东)2,3; Zhu LY(朱俐颖)1,2,3 |
刊名 | ASTRONOMICAL JOURNAL |
出版日期 | 2023-09-01 |
卷号 | 166期号:3 |
ISSN号 | 0004-6256 |
DOI | 10.3847/1538-3881/ace2bc |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Noting the weakest modulation and relatively high metal abundance of the ab-type RR Lyrae star V838 Cyg, we collected the photometric data of this star from several sky surveys to carry out an in-depth analysis. The O - C diagram shows that the pulsation period of V838 Cyg increases linearly over a long timescale. In a reanalysis of the high-precision Kepler data, we confirmed the modulation with a period of 59.45 & PLUSMN; 0.07 days found by Benko et al., and also found an additional weak modulation with a longer period (840 & PLUSMN; 21 days). After a series of analyses, we incline to the view that the mechanisms causing the two modulations are different: the former is more similar to the typical Blazhko effect, while the mechanism leading to the latter may be an extrinsic factor. We also collected and compared the modulation and physical parameters of other Blazhko RR Lyrae stars from several works in the literature, and find that there is a potential negative correlation between the modulation amplitude (or upper limit of amplitude) and the metal abundance. We infer that the relatively high metal abundance will promote convection in the outer stellar atmosphere, and then inhibit those factors (turbulence, shock wave, etc.) that may cause Blazhko modulation. Future observations and research work can be carried out with reference to this viewpoint. We also introduce the moire effects that appear in the Kepler long-cadence light curves and their possible interference in the previous analyses. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS关键词 | FOURIER-METALLICITY RELATIONS ; GLOBULAR-CLUSTERS ; RADIAL-VELOCITIES ; 1ST DETECTION ; LIGHT CURVES ; STARS ; PERIOD ; I. ; VARIABILITY ; FIELD |
资助项目 | National Natural Science Foundation of China[12103084] ; Natural Science Foundation of Yunnan Province[202201AT070187] ; Natural Science Foundation of Yunnan Province[202301AT070352] ; International Cooperation Projects of the National Key Ramp ; D Program[2022YFE0127300] ; International Cooperation Projects of the National Key Ramp ; D Program[e-INFRA CZ LM2018140] ; Ministry of Education ; Association of Universities for Research in Astronomy, Inc., under NASA[NAS5-26555] ; NASA Office of Space Science[NAG5C7584] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:001041272900001 |
资助机构 | National Natural Science Foundation of China[12103084] ; Natural Science Foundation of Yunnan Province[202201AT070187, 202301AT070352] ; International Cooperation Projects of the National Key Ramp ; D Program[2022YFE0127300, e-INFRA CZ LM2018140] ; Ministry of Education ; Association of Universities for Research in Astronomy, Inc., under NASA[NAS5-26555] ; NASA Office of Space Science[NAG5C7584] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26154] |
专题 | 云南天文台_双星与变星研究组 |
通讯作者 | Li LJ(李临甲) |
作者单位 | 1.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, Beijing, 101408, People's Republic of China 2.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, 650216, People's Republic of China; lipk@ynao.ac.cn; 3.Key laboratory of the structure and evolution of celestial objects, Chinese Academy of Sciences, P.O. Box 110, Kunming, 650216, People's Republic of China; |
推荐引用方式 GB/T 7714 | Li LJ,Qian SB,Shi XD,et al. Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation[J]. ASTRONOMICAL JOURNAL,2023,166(3). |
APA | Li LJ,Qian SB,Shi XD,&Zhu LY.(2023).Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation.ASTRONOMICAL JOURNAL,166(3). |
MLA | Li LJ,et al."Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation".ASTRONOMICAL JOURNAL 166.3(2023). |
入库方式: OAI收割
来源:云南天文台
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