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The Energy Transport Induced by Horizontal Turbulence in Rotating W-type W UMa Contact Binaries
Song, Hanfeng1,2,3; Meynet, Georges2; Maeder, Andre2; Peng, Weiguo1; Long, Gang1; Zhang, Ruiyu4; Ekstrom, Sylvia2; Georgy, Cyril2; Huang, Runqian3
2020-12-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume905Issue:1Pages:18
AbstractThe aim of this paper is to investigate the impact of energy transfer on the evolution of contact binaries. Horizontal turbulence is triggered by the differential rotation induced by meridional circulation, which is a direct consequence of nonuniform heating at the inner critical Roche lobes because of strong rotational and tidal distortions. Thermal energy is transferred by the horizontal turbulence from the more massive star to the less massive one, and horizontal turbulence can be responsible for the redistribution of what is a significant fraction of the total core luminosity. The secondary becomes overluminous and oversized owing to energy transfer from the companion star, whereas the primary shifts toward smaller luminosity and is undersized. The convective regions for primaries are enlarged by the improved radiative temperature gradient. The main region for energy transport is located at the bottom of the common envelope because of a higher local density and enthalpy difference. One can find that thermal structure can be disturbed and display periodic thermal relaxation oscillations between the semidetached stage and the contact stage. W-type W UMa contact binaries acquire efficient energy transfer, which can cause the temperature of secondaries to exceed that of the primaries. However, angular momentum loss owing to nonconservative mass transfer can make the system maintain shallow contact and not evolve from overcontact to semidetached configurations, and the system may appear as an A-type W UMa contact binary.
KeywordClose binary stars Stellar rotation Stellar interiors Stellar properties
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province
DOI10.3847/1538-4357/abc877
WOS KeywordLOW-MASS ; DIFFERENTIAL ROTATION ; ANGULAR-MOMENTUM ; MERIDIONAL CIRCULATION ; MICROSCOPIC DIFFUSION ; STELLAR EVOLUTION ; MAIN-SEQUENCE ; MU-GRADIENTS ; STARS ; SYSTEMS
Language英语
Funding ProjectNational Natural Science Foundation of China[11863003] ; National Natural Science Foundation of China[11463002] ; Swiss National Science Foundation[200020-172505] ; Science and Technology Planning Project in Guizhou Province[[2018]5781]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Swiss National Science Foundation ; Swiss National Science Foundation ; Science and Technology Planning Project in Guizhou Province ; Science and Technology Planning Project in Guizhou Province
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000597438200001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80110
Collection中国科学院国家天文台
Corresponding AuthorSong, Hanfeng
Affiliation1.Guizhou Univ, Coll Phys, Guiyang 550025, Guizhou, Peoples R China
2.Univ Geneva, Geneva Observ, CH-1290 Sauverny, Switzerland
3.Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Yunnan, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Song, Hanfeng,Meynet, Georges,Maeder, Andre,et al. The Energy Transport Induced by Horizontal Turbulence in Rotating W-type W UMa Contact Binaries[J]. ASTROPHYSICAL JOURNAL,2020,905(1):18.
APA Song, Hanfeng.,Meynet, Georges.,Maeder, Andre.,Peng, Weiguo.,Long, Gang.,...&Huang, Runqian.(2020).The Energy Transport Induced by Horizontal Turbulence in Rotating W-type W UMa Contact Binaries.ASTROPHYSICAL JOURNAL,905(1),18.
MLA Song, Hanfeng,et al."The Energy Transport Induced by Horizontal Turbulence in Rotating W-type W UMa Contact Binaries".ASTROPHYSICAL JOURNAL 905.1(2020):18.
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