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arXiv 1604.07589astro-ph.SR
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藻类的吸积盘:祖先和进化

Accretion disks in Algols: progenitors and evolution

W. Van Rensbergen, J. P. De Greve

摘要:

只有少数几个阿尔戈星有测量到的吸积盘参数。这些测量为追踪单个系统的起源提供了额外的约束,缩小了初始参数空间。我们研究了6个大陵五吸积盘系统的起源和演化,寻找它们的初始参数和演化约束。利用改进的二进制演化程序,计算一系列紧密的二进制演化,以获得观测到的单个系统的最佳匹配。根据现有的系统参数和观测到的吸积盘特征,确定了6个具有吸积盘的大陵五系统的初始参数。当RLOF开始在核心氢燃烧的供体,磁盘寿命被发现是短的。在大部分的磁盘寿命期间,磁盘亮度与增益器的亮度相当。

英文摘要:

There are only a few Algols with measured accretion disk parameters. These measurements provide additional constraints for tracing the origin of individual systems, narrowing down the initial parameter space. We investigate the origin and evolution of 6 Algol systems with accretion disks to find the initial parameters and evolutionary constraints for them. With a modified binary evolution code, series of close binary evolution are calculated to obtain the best match for observed individual systems. Initial parameters for 6 Algol systems with accretion disks were determined matching both the present system parameters and the observed disk characteristics. When RLOF starts during core hydrogen burning of the donor, the disk lifetime was found to be short. The disk luminosity is comparable to the luminosity of the gainer during a large fraction of the disk lifetime.

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