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arXiv 0810.2265astro-ph
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密近双星的微透镜效应

Microlensing of close binary stars

Nicholas J. Rattenbury

摘要:

多质量系统的引力具有显著的引力效应:背景光源沿着所谓的焦散线被极度放大。在过去的十年里,这一性质一直是一些显着的天体物理学发现的渠道,包括太阳系外行星的探测和表征,边缘变暗的常规分析,以及在一个案例中,对几千秒差距的恒星的表观形状的限制。本文研究了密近双星系统微透镜的性质。我们表明,在某些情况下,它是可能的,以检测流量从近距离双星的洛希叶。这样的观测可能会限制近距离双星系统的模型。

英文摘要:

The gravity due to a multiple-mass system has a remarkable gravitational effect: the extreme magnification of background light sources along extended so-called caustic lines. This property has been the channel for some remarkable astrophysical discoveries over the past decade, including the detection and characterisation of extra-solar planets, the routine analysis of limb-darkening, and, in one case, limits set on the apparent shape of a star several kiloparsec distant. In this paper we investigate the properties of the microlensing of close binary star systems. We show that in some cases it is possible to detect flux from the Roche lobes of close binary stars. Such observations could constrain models of close binary stellar systems.

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