The Theory of Nova Outbursts in the Light of Observations
The Theory of Nova Outbursts in the Light of Observations
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根据观测得出的新星爆发理论
DOI：
10.1007/978-94-011-0335-0_78
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
D. Prialnik
中科院分区：
文献类型：
--
作者：
D. Prialnik
新星理论认为，爆发的原因是富氢物质转移到白色矮星（WD）上，导致热核失控（TNR）。新星理论认为，观测到的特征--峰值光度、喷出物质的数量、成分和平均膨胀速度，或者高光度阶段的持续时间--的巨大变化是由于三个基本参数假设值的差异：吸积WD的质量MWD、温度TWD（或者，等价地，它的光度或年龄）和质量传递速率M（Fujimoto 1982 a，B; MacDonald 1983; Kovetz & Prialnik 1985，Prialnik & Kovetz 1995）。不幸的是，这三个参数是不可直接观察的，间接估计是稀缺和不确定的。因此，这个理论不能被直接检验。人们不得不求助于迂回的检验，以便使理论与观测相对照，并揭示其弱点。
Nova theory postulates that an outburst results from transfer of hydrogenrich material onto a white dwarf (WD), leading to a thermonuclear runaway (TNR). The large variation in the observed features — the peak luminosity, the amount, composition and average expansion velocity of the ejected matter, or the duration of the high-luminosity phase — is attributed by the nova theory to differences in the values assumed for three basic parameters: the accreting WD’s massMWD, its temperatureTWD(or, equivalently, its luminosity or age), and the mass transfer rateM(Fujimoto 1982a,b; MacDonald 1983; Kovetz & Prialnik 1985, Prialnik & Kovetz 1995). These three parameters are, unfortunately, not directly observable and indirect estimates are scarce and uncertain. Hence the theory cannot be straightforwardly tested. One has to resort to roundabout tests in order to confront the theory with the observations and reveal its weak points.