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题名: Seismic study of solar convection and overshooting: results of nonlocal convection
作者: Zhang, Chun-Guang1, 2; Deng, Li-Cai1; Xiong DaRun(熊大闰)3; Christensen-Dalsgaard, Jorgen4
刊名: RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期: 2013-09-01
卷号: 13, 期号:9, 页码:1127-1140
关键词: convection ; Sun: interior ; Sun: helioseismology
学科分类: Astronomy & Astrophysics
DOI: 10.1088/1674-4527/13/9/011
通讯作者: Zhang, CG (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China. Email: cgzhang@nao.cas.cn
文章类型: Article
英文摘要: Local mixing-length theory is incapable of describing nonlocal phenomena in stellar convection, such as overshooting. Therefore standard solar models constructed with local mixing-length theory significantly deviate from the Sun at the boundaries of the convection zone, where convection becomes less efficient and nonlocal effects are important. The differences between observed and computed frequencies mainly come from the region near the surface, while the localized difference in sound speed is just below the convective envelope. We compute a solar envelope model using Xiong's nonlocal convection theory, and carry out helioseismic analysis. The nonlocal model has a smooth transition at the base of the convection zone, as revealed by helioseismology. It reproduces solar frequencies more accurately, and reduces the localized difference in sound speed between the Sun and standard solar models.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: TURBULENT CONVECTION ; STELLAR CONVECTION ; MASSIVE STARS ; SOUND-SPEED ; ZONE ; OSCILLATIONS ; SIMULATIONS ; MODEL ; BASE ; ENVELOPE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000323757800011
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/11223
Appears in Collections:熊大闰_期刊论文

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作者单位: 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
4.Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, DK-8000 Aarhus C, Denmark

Recommended Citation:
Christensen-Dalsgaard.Jorgen, Deng.Li-Cai, Xiong.Da-Run, Zhang.Chun-Guang.Seismic study of solar convection and overshooting: results of nonlocal convection,Research in Astronomy and Astrophysics,2013,13(9):1127-1140
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