Red supergiant variables in the Large Magellanic Cloud: Their evolution and pulsations

	Red supergiant variables in the Large Magellanic Cloud: Their evolution and pulsations
	Li Y(李焱); Gong ZG(龚志刚)
刊名	ASTRONOMY & ASTROPHYSICS
	1994-09
卷号	289 期号:2 页码:449-457
关键词	STARS, OSCILLATIONS SUPERGIANTS MAGELLANIC CLOUDS STARS, VARIABLES, OTHER STARS, EVOLUTION
ISSN号	0004-6361
通讯作者	LI, Y
产权排序	第一完成单位
英文摘要	Evolution and pulsations of red supergiants in the LMC are investigated using realistic evolutionary models of 15M(circle dot), 20M(circle dot) and 30M(circle dot), including the up-to-date opacity, the mass loss through the stellar wind and the overshooting from the convective core. It is found that the mass loss has notable effect on the evolution of stars above 20M(circle dot), and that the evolution of all models during the core helium-burning stage is significantly influenced by the overshooting. The fundamental mode is found to be the pulsation mode of the observed variable stars, while the assumption of the first overtone turns out to be inconsistent with observations. The instability strip is cut off by the mass loss at the high luminosity and by the extremely small time scale during the crossing through the instability strip at the low luminosity. The ratio of the mixing length to the local pressure scale height has to increase along the RGB to fit the observation.
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 COMPRESSIBLE CONVECTION ; BISYSTEM OSCILLATION-THEORY ; LONG-PERIOD VARIABLES ; OBSERVATIONAL TESTS ; HR DIAGRAM ; MASS-LOSS ; STARS ; TEMPERATURES ; SURFACE ; MODELS
收录类别	SCI
原文出处	http://adsabs.harvard.edu/abs/1994A%26A...289..449L
语种	英语
WOS记录号	WOS:A1994PF50600011
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5135]
专题	云南天文台_恒星物理研究组
作者单位	Yunnan observaotry, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China
推荐引用方式 GB/T 7714	Li Y,Gong ZG. Red supergiant variables in the Large Magellanic Cloud: Their evolution and pulsations[J]. ASTRONOMY & ASTROPHYSICS,1994,289(2):449-457.
APA	Li Y,&Gong ZG.(1994).Red supergiant variables in the Large Magellanic Cloud: Their evolution and pulsations.ASTRONOMY & ASTROPHYSICS,289(2),449-457.
MLA	Li Y,et al."Red supergiant variables in the Large Magellanic Cloud: Their evolution and pulsations".ASTRONOMY & ASTROPHYSICS 289.2(1994):449-457.