YNAO OpenIR  > 恒星物理研究组
Influence of the He-flash convective overshoot on mode trapping efficiency in g-mode pulsating subdwarf B stars
Guo JJ(郭军军)1,2,3; Li Y(李焱)1,2,3,4
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2018-08-01
卷号478期号:3页码:3290-3297
DOI10.1093/mnras/sty1010
产权排序第1完成单位
收录类别SCI
关键词Stars: Oscillation Subdwarfs
摘要

Recent detections of g-mode pulsations in subdwarf B (sdB) stars from the space missions CoRoT and Kepler have verified that nearly all of these pulsators have regular period spacings. This discovery has been extensively applied to mode identification for the observed g-mode sdB pulsators. However, the discovery of regular period spacings apparently contradicts the strong g-mode trapping structure expected in canonical sdB models, which is caused by steep chemical gradients in such evolved stars. Although the mode trapping efficiency could be reduced somewhat by taking into account the diffusion effect during the sdB phase, it is still difficult to explain the regular period spacings of g-mode sdB pulsators, especially in the short-period range. We suggest that the regular period spacings may arise earlier in the evolution of sdB stars rather than during the sdB stage itself. As for a canonical sdB star, it is evolved from a low-mass star and is considered to have gone through the He flash. The He flash causes extensive and aggressive convection that extends very close to the He/H transition zone. When considering a proper convective overshoot during the He-flash stage, the chemical profile in the He/H transition zone becomes smoother. Detailed model calculations show that the mode trapping efficiency could be reduced to approximately the level of observations throughout the observed period range by taking the He-flash overshoot into account.

资助项目NSFC of China[11333006] ; NSFC of China[11521303] ; foundation of Chinese Academy of Sciences[XDB09010202]
项目资助者NSFC of China ; foundation of Chinese Academy of Sciences
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
ISSN0035-8711
URL查看原文
WOS记录号WOS:000441282300032
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Core Helium Flash ; Extremely Metal-poor ; Blue Hook Stars ; Compact Pulsators ; Omega-centauri ; Hydrodynamic Simulations ; Spectroscopic Analyses ; Multicolor Photometry ; Stellar Parameters ; Period Spacings
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17827
专题恒星物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Guo JJ(郭军军); Li Y(李焱)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming 650011, China
2.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, Kunming 650011, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
推荐引用方式
GB/T 7714
Guo JJ,Li Y. Influence of the He-flash convective overshoot on mode trapping efficiency in g-mode pulsating subdwarf B stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(3):3290-3297.
APA Guo JJ,&Li Y.(2018).Influence of the He-flash convective overshoot on mode trapping efficiency in g-mode pulsating subdwarf B stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(3),3290-3297.
MLA Guo JJ,et al."Influence of the He-flash convective overshoot on mode trapping efficiency in g-mode pulsating subdwarf B stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.3(2018):3290-3297.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Influence of the He-(494KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Guo JJ(郭军军)]的文章
[Li Y(李焱)]的文章
百度学术
百度学术中相似的文章
[Guo JJ(郭军军)]的文章
[Li Y(李焱)]的文章
必应学术
必应学术中相似的文章
[Guo JJ(郭军军)]的文章
[Li Y(李焱)]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Influence of the He-flash convective overshoot on mode trapping efficiency in g-mode pulsating subdwarf B stars.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。