Reanalysis of c-type RR Lyrae variable BE Dor, period modulations and possible mechanism | |
Li LJ(李临甲)1; Qian SB(钱声帮)1,2; Zhu LY(朱俐颖)1,2 | |
刊名 | Monthly Notices of the Royal Astronomical Society |
2022-03-01 | |
卷号 | 510期号:4页码:6050-6058 |
关键词 | techniques: photometric stars: fundamental parameters stars: individual: BE Dor, stars: variables: RR Lyrae |
ISSN号 | 0035-8711 |
DOI | 10.1093/mnras/stab3808 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | We reanalysed the c-type RR Lyrae star BE Dor (MACHO 5.4644.8, OGLE-LMC-RRLYR-06002) that had been discovered to show cyclic period changes. The photometric data of several sky surveys (DASCH, MACHO, OGLE, ASAS-SN, and TESS) were used for analyses. The O - C diagram and pulsation period obtained from Fourier analysis show significant period modulations in BE Dor. However, different from the previous viewpoint, the changes are quasi-periodic and abrupt. Therefore, the light-traveltime effect caused by the companion motion cannot explain the changes. Noting a same subtype star KIC 9453114 with similar phenomena has a high macroturbulent velocity, and the degree of O - C changes seem to be positively correlated with these velocities, we consider that the mechanism leading to period modulation should be caused by the interaction between turbulent convection and magnetic field activity in the ionization zone, i.e. the viewpoint of Stothers. It may not explain the general Blazhko effect but should explain such period modulations in BE Dor and those other c-type RR Lyrae stars. We hope our discoveries and viewpoints can provide some information and inspiration for relevant research. © 2022 Oxford University Press. All rights reserved. |
学科主题 | 天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
资助项目 | US Department of Energy through the University of California, Lawrence Livermore National LaboratoryUnited States Department of Energy (DOE)[W-7405-Eng-48] ; National Science Foundation through the Center for Particle Astrophysics of the University of CaliforniaNational Science Foundation (NSF)[AST-8809616] ; Mount Stromlo and Siding Spring Observatory, part of the Australian National UniversityAustralian National University ; NSFNational Science Foundation (NSF)[AST-0407380] ; NSFNational Science Foundation (NSF)[AST-0909073] ; NSFNational Science Foundation (NSF)[AST-1313370] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11803084] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11933008] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11922306] |
WOS关键词 | KEPLER PHOTOMETRY ; CONVECTIVE CYCLES ; OGLE COLLECTION ; MAGNETIC-FIELD ; STARS ; 1ST-OVERTONE ; DIAGRAMS ; PULSATION ; CATALOG ; DRIVE |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | Oxford University Press |
WOS记录号 | WOS:000764893900002 |
资助机构 | US Department of Energy through the University of California, Lawrence Livermore National LaboratoryUnited States Department of Energy (DOE)[W-7405-Eng-48] ; National Science Foundation through the Center for Particle Astrophysics of the University of CaliforniaNational Science Foundation (NSF)[AST-8809616] ; Mount Stromlo and Siding Spring Observatory, part of the Australian National UniversityAustralian National University ; NSFNational Science Foundation (NSF)[AST-0407380, AST-0909073, AST-1313370] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11803084, 11933008, 11922306] |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24913] |
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.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box110, Yunnan, Kunming, 650011, China; 2.University of Chinese Academy of Sciences, No.19(A) Yuquan Road Shijingshan District, Beijing, 100049, China |
推荐引用方式 GB/T 7714 | Li LJ,Qian SB,Zhu LY. Reanalysis of c-type RR Lyrae variable BE Dor, period modulations and possible mechanism[J]. Monthly Notices of the Royal Astronomical Society,2022,510(4):6050-6058. |
APA | Li LJ,Qian SB,&Zhu LY.(2022).Reanalysis of c-type RR Lyrae variable BE Dor, period modulations and possible mechanism.Monthly Notices of the Royal Astronomical Society,510(4),6050-6058. |
MLA | Li LJ,et al."Reanalysis of c-type RR Lyrae variable BE Dor, period modulations and possible mechanism".Monthly Notices of the Royal Astronomical Society 510.4(2022):6050-6058. |
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