摘要
本文应用正、负能谱系统热力学理论较仔细地分析了白矮星的初期演化过程 ,其结果虽然与过去有关理论在力学平衡问题上的结论一致 ,但本文所依据的基础和思路与过去理论大不相同 .按原有理论 ,认为白矮星只是一个高度简并的电子系统 ,而氦离子系统仅作为约束电子系统的外部条件 ,显然这个理论模型不能反映白矮星的实际状态 ,因为白矮星并非一个电子系统 ,而是由电子与氦离子组成的复合系统 ,因此 ,原有理论除了可以描写电子系统的力学平衡外 ,它根本不可能描述白矮星的演化 ,本文将白矮星视为电子系统与氦离子系统的复合系统 ,不仅可以描述白矮星的力学平衡 ,而且还可以通过熵的演化来描写白矮星的演化进程 .
By using the positive and negative energy spectrum thermodynamical thery(PNES thermodynamical theory), the evolution process at early stage of white dwarf stars has been analysed carefully. Although the condusion of this theory is consistent with conclusion of the mechanicod euilibrium problem for original theory, but the fundamental principle and the train of thought in this theory is guite different from the original theory. According as the original theory regard the white dwarf star system as a electron system alone, the helium ion system is only looked as a external condition that the electron syetem is restricted. It is clearly, that the original theory cant reflicts the practical state of white dwarf stars, because the white dwarf star isnt a electron system, but is a composite system which is composed of the electron system and helium ion system. Therefore, except the mechanical equilibrium problem, the original theory cant represent the evolution of white dwarf star through the evolution of its entropy. The present theory(PNES thermodynamics theory)regard that the white dwarf star is a composite system which is composed of electron system and helium ion system, and thus not only the mechanical equilibrium problems, but also the evolutions of white dwarf star system are all well represented by the PNES thermodynmics theory.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第6期991-995,共5页
Journal of Southwest China Normal University(Natural Science Edition)
