论文标题
Superwide目录：在Gaia中发现的99,203宽二进制文件的目录，并补充了SuperBlink高度运动目录
The SUPERWIDE Catalog: A Catalog of 99,203 Wide Binaries Found in Gaia and Supplemented by the SUPERBLINK High Proper Motion Catalog
论文作者
论文摘要
我们提供了一个由99,203个宽二元系统组成的目录，最初从约520万星的子集中鉴定为常见的适当运动（CPM）对，并以适当的运动$μ> 40 $ MAS/年/年，从Gaia Data Release 2（DR2）和SuperBlink High Apprich Motion Catalog中选择。通过搜索具有角度分离的恒星$ <1 $度和适当的运动差异$Δμ<40 $ mas/alay/年来找到CPM对。然后分两个步骤应用贝叶斯分析。在第一次通过中，我们使用适当的运动差异和角度分离来区分二进制和偶然的比对。在第二次通过中，我们使用Gaia DR2的视差数据来完善我们的贝叶斯概率估计。我们提供了一张119,390对的表，进行了完整的分析，其中99,203对具有概率> 95 \％的真正二进制文件。在这99,203个高概率对中，我们估计只有大约364对最有可能是假阳性。此外，我们确定了57,506对，具有概率$> 10 \％$的$> 10 \％$，但具有很高的视差错误，因此在第二次通过中没有被审查。我们检查了我们最高概率对的预计物理分离分布，并注意该分布是一个简单的指数尾巴，没有显示双模式的证据。在概率较低的对中，在较大的分离（$> 10^{4-5} $ au）中检测到较广泛的二进制文件，与以前的研究中所建议的非常广泛的人群一致，但是我们的分析表明，这些分析并不代表不同的人群。我们检查了这组高概率宽的二进制文件的人力资源图，并在2,227 k+k宽的二进制文件中找到了980个浮肿成分的证据；假设这些代表未解决的子系统，我们确定K+K宽系统的高阶多重性分数至少为39.6 \％。
We present a catalog of 99,203 wide binary systems, initially identified as common proper motion (CPM) pairs from a subset of ~5.2 million stars with proper motions $μ> 40$ mas/year, selected from Gaia data release 2 (DR2) and the SUPERBLINK high proper motion catalog. CPM pairs are found by searching for pairs of stars with angular separations $< 1$ degree and proper motion differences $Δμ< 40$ mas/year. A Bayesian analysis is then applied in two steps. In a first pass, we use proper motion differences and angular separations to distinguish between binaries and chance alignments. In a second pass, we use parallax data from Gaia DR2 to refine our Bayesian probability estimates. We present a table of 119,390 pairs which went through the full analysis, 99,203 of which have probabilities $>95\%$ of being real binaries. Of those 99,203 high probability pairs, we estimate that only about 364 pairs are most likely to be false positives. In addition, we identify 57,506 pairs which have probabilities $>10\%$ from the first pass but have high parallax errors and therefore were not vetted in the second pass. We examine the projected physical separation distribution of our highest probability pairs and note that the distribution is a simple exponential tail and shows no evidence of being bi-modal. Among pairs with lower probability, wide binaries are detected at larger separations ($>10^{4-5}$ AU) consistent with the very wide population suggested in previous studies, however our analysis suggests that these do not represent a distinct population. We examine the HR diagram of this set of high probability wide binaries and find evidence for 980 over-luminous components among 2,227 K+K wide binaries; assuming these represent unresolved sub-systems, we determine that the higher order multiplicity fraction for K+K wide systems is at least 39.6\%.
