Asteroseismology of DAV star EC14012-1446, mode identification and model fittings

	Asteroseismology of DAV star EC14012-1446, mode identification and model fittings
	Chen YH(陈彦辉)1,2,3 ; Li Y(李焱)1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2014-10-01
卷号	443 期号:4 页码:3477-3485
关键词	asteroseismology stars: individual: EC14012-1446 white dwarfs
ISSN号	0035-8711
通讯作者	Chen, YH (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	EC14012-1446 was observed by Handler et al. in 2004 April, June, 2005 May, and 2007 April, and by Provencal et al. in 2008. We review the observations together and obtain 34 independent frequencies. According to the frequency splitting and the asymptotic period spacing law, we identify 6 l = 1 modes, 4 l = 2 modes, 5 l = 3 modes, 10 l = 1 or 2 modes. Grids of white dwarf models are generated by WDEC with H, He, C, O diffusion in a four-parameter space. The core compositions are directly from white dwarf models generated by MESA. The best-fitting model has M-* = 0.710 M-circle dot, T-eff = 12 200 K, log(M-He/M-) = -2.5, log(M-H/M-) = -7.0, log g = 8.261, and phi = 3.185 s. There are four, two, and one modes identified as trapped in H envelope for observed l = 1, 2, and 3 modes, respectively. Trapped modes jump the queue of uniform period spacing.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ZZ CETI STARS ; THERMONUCLEAR REACTION-RATES ; WHOLE EARTH TELESCOPE ; WHITE-DWARFS ; EVOLUTIONARY MODELS ; INSTABILITY STRIP ; SPECTROSCOPY ; OSCILLATIONS
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/443/4/3477
语种	英语
WOS记录号	WOS:000342922100048
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5236]
专题	云南天文台_恒星物理研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Chen YH,Li Y. Asteroseismology of DAV star EC14012-1446, mode identification and model fittings[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,443(4):3477-3485.
APA	Chen YH,&Li Y.(2014).Asteroseismology of DAV star EC14012-1446, mode identification and model fittings.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,443(4),3477-3485.
MLA	Chen YH,et al."Asteroseismology of DAV star EC14012-1446, mode identification and model fittings".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 443.4(2014):3477-3485.