Asteroseismology of the DAV star R808
文献类型:期刊论文
作者 | Chen, Y. H.1,2,3; Shu, H.1,2 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2021-02-01 |
卷号 | 500期号:4页码:4703-4709 |
ISSN号 | 0035-8711 |
关键词 | asteroseismology white dwarfs |
DOI | 10.1093/mnras/staa3572 |
文献子类 | Article |
英文摘要 | The DAV star 8808 was observed by 13 different telescopes for more than 170 h in 2009 April on the WET run XCOV26. 25 independent pulsation frequencies were identified by this data set. We assumed 19 m = 0 modes and performed an asteroseismological study on those 19 modes. We evolve grids of DAV star models by WDEC adopting the element diffusion scheme with pure and screened Coulomb potential effect. The core compositions are from white dwarf models evolved by MESA, which are thermal nuclear burning results. Our best-fitting model is from the screened Coulomb potential scenario, which has parameters of log(M-He/M-* = -2.4, log(M-H/M-*) = -5.2, T-eff = 11100 K, M-* = 0.710 M-circle dot, logg = 8.194, and sigma(Rms) = 2.86 s. The value of sigma(Rms) is the smallest among the four existing asteroseismological work. The average period spacing is 46.299 s for not equal 1 modes and 25.647 s for not equal 2 modes. The other six observed modes can be fitted by m not equal 0 components of some modes for our best-fitting model. Fitting the 25 observed modes, we obtain a a RN's value of 2.59 s. Considering the period spacings, we also assume, that at least in one case, we detect an 1= 2 trapped mode. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星物理学 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
WOS关键词 | ZZ-CETI STARS ; BISYSTEM OSCILLATION-THEORY ; WHOLE EARTH TELESCOPE ; THERMAL-CONDUCTIVITIES ; WHITE-DWARFS ; DENSE MATTER ; DIFFUSION ; EVOLUTION |
资助项目 | NSFC of China[11803004] ; NSFC of China[11563001] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000606297700031 |
资助机构 | NSFC of China[11803004, 11563001] |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24099] |
专题 | 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Chen, Y. H. |
作者单位 | 1.Institute of Astrophysics, Chuxiong Normal University, Chuxiong 675000, China 2.School of Physics and Electronical Science, Chuxiong Normal University, Chuxiong 675000, China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China |
推荐引用方式 GB/T 7714 | Chen, Y. H.,Shu, H.. Asteroseismology of the DAV star R808[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,500(4):4703-4709. |
APA | Chen, Y. H.,&Shu, H..(2021).Asteroseismology of the DAV star R808.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,500(4),4703-4709. |
MLA | Chen, Y. H.,et al."Asteroseismology of the DAV star R808".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 500.4(2021):4703-4709. |
入库方式: OAI收割
来源:云南天文台
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