Studies of the Nova Outburst & Pulsating Stars

将对新星爆发的原因和演化以及热脉动变星的驱动机制进行研究。这些研究将使用拉格朗日流体力学计算机程序，该程序包括大型核反应网络、元素扩散、吸积、新的表面边界条件和最新可用的状态方程。具体项目有：(1)研究富氢物质吸积到强磁化白矮星上的后果；(2)探索已经提出的各种机制来解释观测到的中等质量元素丰度，并对Na-22和Al-26做出具体预测；(3)研究白矮星停止核燃烧和恢复静止的原因，包括动力摩擦和辐射压力驱动的质量损失的影响；(4)以即将爆发的慢新星T Pyx为中心的周期性新星现象的研究；(6)利用非径向、非绝热分析和新组分研究了GW Vir （PG1159-035）包层氦丰度；(7)对V471双星系统中的脉动白矮星进行研究，旨在发现其变异性的原因；(8) PG1159-035变量含扩散的冷却序列研究；(9)凯斯蓝星调查中爆发新星和蓝恒星物体的光学光谱研究。

Research will be carried out to investigate the cause and evolution of the nova outburst and the driving mechanism of the hot, pulsating variable stars. The studies will use a Lagrangian, hydrodynamic computer program that includes a large nuclear reaction network, element diffusion, accretion, new surface boundary conditions and the latest available equations of state. The specific projects are: (1) a study of the consequences of accretion of hydrogen rich material onto a strongly magnetized white dwarf; (2) a study to explore the various mechanisms that have been proposed to explain the observed abundances of the intermediate mass elements and make specific predictions with respect to Na-22 and Al-26, (3) a study to determine the cause of the cessation of nuclear burning and the return to quiescence of the white dwarf which will include the effects of dynamical friction and radiation pressure driven mass loss; (4) a study of the recurrent nova phenomena concentrating on T Pyx, a slow nova due for an outburst in the near future; (6) a study of the helium abundance in the envelopes of the GW Vir (PG1159-035 variables) by means of nonradial, nonadiabatic analyses and new compositions; (7) a study of the pulsating white dwarf in the V471 binary system with the intent of discovering the cause of its variability; (8) a study of cooling sequences, with diffusion included, for the PG1159-035 variables; and (9) optical spectroscopic studies of novae in outburst and blue stellar objects from the Case Blue Star survey.