Properties of semi-convection and convective overshooting for massive stars

	Properties of semi-convection and convective overshooting for massive stars
	Ding CY(丁彩云)1,2,3 ; Li Y(李焱)1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2014-02
卷号	438 期号:2 页码:1137-1148
关键词	convection diffusion turbulence stars: abundances stars: evolution stars: massive
ISSN号	0035-8711
通讯作者	Ding, CY (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	The properties of semi-convection and core convective overshooting of stars with masses of 15 and 30 M-circle dot are calculated in the present article. New methods are used to deal with semi-convection. Different entropy gradients are used when adopting the Schwarzschild and Ledoux methods, which are used to confine the convective boundary and calculate the turbulent quantities: partial derivative(s) over bar/partial derivative r = -(c(p)/H-P)(del - del(ad)) when the Schwarzschild method is adopted and partial derivative(s) over bar/partial derivative r = -(c(p)/H-P)(del - del(ad) - del(mu)) when the Ledoux method is adopted. Core convective overshooting and semi-convection are treated as a whole and their development is found to present almost opposing tendencies: more intensive core convective overshooting leads to weaker semi-convection. The influence of different parameters and convection processing methods on the turbulent quantities is analysed in this article. Increasing the mixing-length parameter alpha leads to more turbulent dynamic energy in the convective core and prolongs the overshooting distance but depresses the development of semi-convection. Adoption of the Ledoux method leads to overshooting extending further and semi-convection development being suppressed.
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]	TURBULENT CONVECTION ; EVOLUTION ; MODELS ; SEMICONVECTION ; HYDRODYNAMICS ; DIFFUSION ; OPACITIES ; REGION
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/438/2/1137
语种	英语
WOS记录号	WOS:000330955900019
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5241]
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.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Ding CY,Li Y. Properties of semi-convection and convective overshooting for massive stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,438(2):1137-1148.
APA	Ding CY,&Li Y.(2014).Properties of semi-convection and convective overshooting for massive stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,438(2),1137-1148.
MLA	Ding CY,et al."Properties of semi-convection and convective overshooting for massive stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 438.2(2014):1137-1148.