SLoWPoKES-II: 100,000 WIDE BINARIES IDENTIFIED IN SDSS WITHOUT PROPER MOTIONS
SLoWPoKES-II: 100,000 WIDE BINARIES IDENTIFIED IN SDSS WITHOUT PROPER MOTIONS
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SLoWPoKES-II：在没有适当动作的情况下在 SDSS 中识别出 100,000 个宽二进制文件
DOI：
10.1088/0004-6256/150/2/57
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Angela P. Massey
中科院分区：
文献类型：
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作者：
S. Dhital;A. West;K. Stassun;K. Schluns;Angela P. Massey
我们提出了斯隆低质量宽运动等效星对(SLoWPoKES)-II目录，该目录是通过匹配光度距离从斯隆数字巡天（SDSS）中识别出来的低质量视觉双星。通过比较恒星信息来筛选候选对。通过比较各自银河系位置的恒星密度和模拟银河系的蒙特卡罗实现来审查候选对。通过这种方式，我们能够在不需要适当运动的情况下识别大量真正的宽二进制。在这里，确定了105,537个角间距为~ 1-20″的视觉双星，每个双星的对齐概率≤5%。这是迄今为止最大的真正宽双星目录，它包含了质量、质量比、双星分离、金属丰度和进化状态等多种系统，这将有助于后续研究M矮星和白矮星的特性。有一个微妙但明确的建议，即在物理分离分布中存在多个种群，支持早期的发现。我们认为宽双星由多个种群组成，很可能代表不同的形成模式。有141颗M7或更高的宽双星候选者，比目前已知的数量增加了7倍。这些双星太宽，不可能是通过弹射机制形成的。最后，我们发现6%的光谱确认的M矮星不包括在SDSS STAR星表中；由于附近存在一个或部分分解的伴星，它们被错误地归类为扩展源。通过Filtergraph数据可视化门户网站，整个万维网社区都可以公开获得slowkes - ii目录。
We present the Sloan Low-mass Wide Pairs of Kinematically Equivalent Stars (SLoWPoKES)-II catalog of low-mass visual binaries identified from the Sloan Digital Sky Survey (SDSS) by matching photometric distances. The candidate pairs are vetted by comparing the stellar information. The candidate pairs are vetted by comparing the stellar density at their respective Galactic positions to Monte Carlo realizations of a simulated Milky Way. In this way, we are able to identify large numbers of bona fide wide binaries without the need for proper motions. Here, 105,537 visual binaries with angular separations of ∼1–20″ were identified, each with a probability of chance alignment of ≤5%. This is the largest catalog of bona fide wide binaries to date, and it contains a diversity of systems—in mass, mass ratios, binary separations, metallicity, and evolutionary states—that should facilitate follow-up studies to characterize the properties of M dwarfs and white dwarfs. There is a subtle but definitive suggestion of multiple populations in the physical separation distribution, supporting earlier findings. We suggest that wide binaries are composed of multiple populations, most likely representing different formation modes. There are 141 M7 or later wide binary candidates, representing a seven-fold increase over the number currently known. These binaries are too wide to have been formed via the ejection mechanism. Finally, we found that 6% of spectroscopically confirmed M dwarfs are not included in the SDSS STAR catalog; they are misclassified as extended sources due to the presence of a nearby or partially resolved companion. The SLoWPoKES-II catalog is publicly available to the entire community on the World Wide Web via the Filtergraph data visualization portal.