The Detectability of Planetary Companions of Compact Galactic Objects from Their Effects on Microlensed Light Curves of Distant Stars
The Detectability of Planetary Companions of Compact Galactic Objects from Their Effects on Microlensed Light Curves of Distant Stars
复制标题
致密星系天体的行星伴星对遥远恒星微透镜光曲线的影响可被探测到
DOI：
10.1086/174885
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
E. Falco
中科院分区：
文献类型：
--
作者：
A. Bolatto;E. Falco
我们讨论了一种检测恒星质量星系物体暗伴星的可能方法。这样的双星系统很可能出现在银盘中，也可能出现在光环中。太阳附近双星和更高多重性系统的高发生率，如果表明整个银盘，意味着当前对银河系中巨大致密天体的引力微透镜特征的搜索将产生双星系统的很大一部分。我们的计算表明，在此类搜索中获得的 40% 的光曲线可能受到足够的扰动，如果采样充分的话，可能会揭示出围绕主星运行的木星质量的致密暗伴星的存在。系统搜索程序还必须考虑发生扰动光曲线的可能性，以提高其事件检测效率。如果仔细解释的话，扰动透镜事件的统计数据可以得出低质量比双星系统（包括具有行星的系统）发生率的估计。
We discuss a possible method for detection of dark companions of galactic objects of stellar mass. Such binary systems are likely to occur in the galactic disk and possibly also in the halo. The high incidence of binary and higher-multiplicity systems in the solar neighborhood, if indicative of the galactic disk at large, implies that current searches for the gravitational microlensing signature of massive compact objects in our galaxy would yield a significant fraction of binary systems. Our calculations suggest that 40% of the lightcurves that will be obtained in such searches may be sufficiently perturbed to reveal, if sufficiently well-sampled, the presence of a compact dark companion of Jovian mass orbiting a primary. The likelihood of occurrence of perturbed lightcurves must also be taken into account by systematic search programs, to improve their event detection efficiency. The statistics of perturbed lensing events, if carefully interpreted, could yield estimates of the incidence of binary systems with low mass ratios, including that of systems with planets.