Asteroseismology of the DAV star R808
Chen, Y. H.1,2,3; Shu, H.1,2
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2021-02-01
卷号500期号:4页码:4703-4709
DOI10.1093/mnras/staa3572
收录类别SCI
关键词asteroseismology white dwarfs
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.

资助项目NSFC of China[11803004] ; NSFC of China[11563001]
项目资助者NSFC of China[11803004, 11563001]
语种英语
学科领域天文学 ; 恒星与银河系 ; 恒星物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS记录号WOS:000606297700031
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ZZ-CETI STARS ; BISYSTEM OSCILLATION-THEORY ; WHOLE EARTH TELESCOPE ; THERMAL-CONDUCTIVITIES ; WHITE-DWARFS ; DENSE MATTER ; DIFFUSION ; EVOLUTION
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/24100
专题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
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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.
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