论文标题
CWISE J014611.20-050850.0AB：最广泛的已知棕色矮人二进制
CWISE J014611.20-050850.0AB: The Widest Known Brown Dwarf Binary in the Field
论文作者
论文摘要
虽然恒星经常在二元系统中发现，但棕色矮人的二进制文件却少得多。棕色矮人 - 棕色矮人对通常很难解决，因为它们的分离通常很小。使用Brown Dwarfs通过Backet Worlds：Planet 9 Citizen Science Project从宽阔红外调查探险家（Wise）中发现的数据发现，我们检查了其他更高的分辨率，Sky Sky Surveys vorl Booked Cold Companions。在此过程中，我们发现了Brown Dwarf Binary System Cwise J0146 $ -0508AB，我们发现基于系统组件的类似适当运动的机会对齐概率很小。使用Keck/Nires的后续近红外光谱法，我们确定了L4和L8（蓝色）的组件光谱类型，使CWISE J0146 $ - $ 0508AB是蓝色L矮人仅有的少数几个基准系统之一。在$ \ sim $ 40 PC的估计距离时，CWISE J0146 $ - $ 0508AB的预计分离为$ \ sim $ 129 au，使其成为迄今为止发现的最宽的棕色矮人对。我们发现，对于棕色矮人二进制的如此宽的分离可能意味着在低密度星形区域中形成。
While stars are often found in binary systems, brown dwarf binaries are much rarer. Brown dwarf--brown dwarf pairs are typically difficult to resolve because they often have very small separations. Using brown dwarfs discovered with data from the Wide-field Infrared Survey Explorer (WISE) via the Backyard Worlds: Planet 9 citizen science project, we inspected other, higher resolution, sky surveys for overlooked cold companions. During this process we discovered the brown dwarf binary system CWISE J0146$-$0508AB, which we find has a very small chance alignment probability based on the similar proper motions of the components of the system. Using follow-up near-infrared spectroscopy with Keck/NIRES, we determined component spectral types of L4 and L8 (blue), making CWISE J0146$-$0508AB one of only a few benchmark systems with a blue L dwarf. At an estimated distance of $\sim$40 pc, CWISE J0146$-$0508AB has a projected separation of $\sim$129 AU, making it the widest separation brown dwarf pair found to date. We find that such a wide separation for a brown dwarf binary may imply formation in a low-density star-forming region.
