We present the discovery and spectroscopic follow-up of a nearby late-type L dwarf (2M0614+3950), and two extremely wide very-low-mass binary systems (2M0525-7425AB and 2M1348-1344AB), resulting from our search for common proper motion pairs containing ultracool components in the Two Micron All Sky Survey (2MASS) and the Wide-field Infrared Survey Explorer (WISE) catalogs. The near-infrared spectrum of 2M0614+3950 indicates a spectral type L9 ± 1 object residing at a distance of 26.0 ± 1.8 pc. The optical spectrum of 2M0525-7425A reveals an M3.0 ± 0.5 dwarf primary, accompanied by a secondary previously classified as L2. The system has an angular separation of ~ 44″, equivalent to ~ 2000 AU at distance of 46.0 ± 3.0 pc. Using optical and infrared spectra, respectively, we classify the components of 2M1348-1344AB as M4.5 ± 0.5 and T5.5 ± 1. The angular separation of ~ 68″ is equivalent to ~ 1400 AU at a distance of 20.7 ± 1.4 pc. 2M1348-1344AB is one of only six very wide (separation > 1000 AU) systems containing late T dwarfs known to date.

中文翻译：

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在 L/T 过渡处发现了两个具有超冷伴星的非常宽的双星和一个新的棕矮星

我们展示了附近晚型 L 矮星 (2M0614+3950) 和两个极宽的极低质量双星系统 (2M0525-7425AB 和 2M1348-1344AB) 的发现和光谱跟踪包含两微米全天巡天 (2MASS) 和广域红外巡天探测器 (WISE) 目录中超冷组件的自运动对。2M0614+3950 的近红外光谱表明光谱类型为 L9 ± 1 的物体位于 26.0 ± 1.8 pc 的距离处。2M0525-7425A 的光谱显示 M3.0 ± 0.5 矮星主星，伴随着一个先前分类为 ​​L2 的次星。该系统的角间距为 ~ 44"，相当于 46.0 ± 3.0 pc 距离处的 ~ 2000 AU。分别使用光学和红外光谱，我们将 2M1348-1344AB 的成分分类为 M4.5 ± 0.5 和 T5.5 ± 1。在 20.7 ± 1.4 pc 的距离处，~68" 的角间距相当于~1400 AU。2M1348-1344AB 是迄今为止已知的包含晚 T 矮星的仅有的六个非常宽（间隔 > 1000 AU）的系统之一。