| 关于恒星大气超声对流的注释 |
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| 引用本文： | 熊大闰,邓李才. 关于恒星大气超声对流的注释[J]. 天文学报, 2011, 52(3): 177-179 |
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| 作者姓名： | 熊大闰 邓李才 |
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| 作者单位： | 1. 中国科学院紫金山天文台,南京,210008
2. 中国科学院国家天文台,北京,100012 |
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| 摘 要： | 1引言尽管有诸多的不满之处,由于其物理上的直观性和应用上的简单性,至今混合长理论仍几乎是唯一一个广泛用于恒星结构、演化和脉动计算的恒星对流理论.混合长理论预言,在红、黄巨星和超巨星大气中,对流是超声速的.我们曾指出,混合长理论隐含了一个假定,对流是亚声速的.对于超声速对流,无论从物理的真实性,还是从混合长公式的数学表述来看,混合长理论都是不正确的.因此超声对流的真实性是存在问题
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| 关 键 词： | 对流 恒星:大气 |
A Note on Supersonic Convection in Stellar Atmosphere |
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| XIONG Da-run,DENG Li-cai. A Note on Supersonic Convection in Stellar Atmosphere[J]. Acta Astronomica Sinica, 2011, 52(3): 177-179 |
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| Authors: | XIONG Da-run DENG Li-cai |
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| Affiliation: | XIONG Da-run~1 DENG Li-cai~2 (1 Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008) (2 National Astronomical Observatories,Beijing 100012) |
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| Abstract: | Using a non-local convection theory,both of the local and non-local convective envelope models of evolutionary series of stars with masses from 1 to 30 solar masses are calculated. The problem of supersonic convection is reviewed.The results show that convective velocities in the stellar atmosphere are seriously overestimated by the local mixing-length theory.Convection is strong supersonic in the atmosphere of yellow giants and super-giants in the local mixing-length theory.They,however,become subsonic for... |
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| Keywords: | convection stars:atmospheres |
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