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Seismic study of solar convection and overshooting: results of nonlocal convection
Zhang, Chun-Guang1,2; Deng, Li-Cai1; Xiong, Da-Run3; Christensen-Dalsgaard, Jorgen4; Zhang, CG (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China. Email: cgzhang@nao.cas.cn
2013-09-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume13Issue:9Pages:1127-1140
AbstractLocal 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.
KeywordConvection Sun: Interior Sun: Helioseismology
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1674-4527/13/9/011
WOS KeywordTURBULENT CONVECTION ; STELLAR CONVECTION ; MASSIVE STARS ; SOUND-SPEED ; ZONE ; OSCILLATIONS ; SIMULATIONS ; MODEL ; BASE ; ENVELOPE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000323757800011
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/11223
Collection院士文集_熊大闰
Corresponding AuthorZhang, CG (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China. Email: cgzhang@nao.cas.cn
Affiliation1.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
GB/T 7714
Zhang, Chun-Guang,Deng, Li-Cai,Xiong, Da-Run,et al. Seismic study of solar convection and overshooting: results of nonlocal convection[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(9):1127-1140.
APA Zhang, Chun-Guang,Deng, Li-Cai,Xiong, Da-Run,Christensen-Dalsgaard, Jorgen,&Zhang, CG .(2013).Seismic study of solar convection and overshooting: results of nonlocal convection.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(9),1127-1140.
MLA Zhang, Chun-Guang,et al."Seismic study of solar convection and overshooting: results of nonlocal convection".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.9(2013):1127-1140.
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