关于RR天琴座星长期循环周期变化的解释
On the interpretation of the long-term cyclic period variations in RR Lyrae stars
摘要：
许多天琴座RR型星的脉动周期都有长期的变化，有些甚至是周期性的。这种行为可以归因于由看不见的同伴引起的光旅行时间效应（LTTE）。猛虎组织的解决方案往往建议非常偏心的轨道和最小的质量的同伴的顺序上的几个太阳的质量，因此，在黑洞的范围。我们讨论的可能性发生的RR Lyr-黑洞对和Z CVn的情况下，证明LTTE假设可以是假的一些二元候选人。
英文摘要：
Many RR Lyrae stars show long-term variations of their pulsation period, some of them in a cyclic way. Such behaviour can be attributed to the light-travel time effect (LTTE) caused by an unseen companion. Solutions of the LTTE often suggest very eccentric orbits and minimal mass of the companion on the order of several solar masses, thus, in the black hole range. We discuss the possibility of the occurrence of the RR Lyr-black hole pairs and on the case of Z CVn demonstrate that the LTTE hypothesis can be false in some of the binary candidates.
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