DISCOVERY OF A BINARY BROWN DWARF AT 2 pc FROM THE SUN
DISCOVERY OF A BINARY BROWN DWARF AT 2 pc FROM THE SUN
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DOI：
10.1088/2041-8205/767/1/l1
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
K. Luhman
中科院分区：
文献类型：
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作者：
K. Luhman
我正在使用宽视场红外巡天探测器（WISE）的多历元天体测量，通过它们的高自行来寻找太阳邻域的新成员。通过这项工作，我已经确定WISE J104915.57 - 531906.1是一个高自行天体，并在数字化巡天、2微米全天空巡天和南天深近红外巡天的图像中发现了额外的探测。在这些巡天中，我从天体测量中测量到视差为0.“496 ± 0.”037（2.0 ± 0.15 pc），使WISE J104915.57−531906.1成为第三个离太阳最近的系统。在双子座天文台的双子座多目标摄谱仪的光谱观测中，i波段采集的图像将其解析为1.“5（3 Au）的双星。收集了主要的光谱，我将其分类为L 8 ± 1。次级可能也在L/T过渡附近，因为它只是比初级稍微暗一些（Δi = 0.45等）。
I am using multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to search for new members of the solar neighborhood via their high proper motions. Through this work, I have identified WISE J104915.57−531906.1 as a high proper motion object and have found additional detections in images from the Digitized Sky Survey, the Two Micron All-Sky Survey, and the Deep Near-Infrared Survey of the Southern Sky. I have measured a parallax of 0.″496 ± 0.″037 (2.0 ± 0.15 pc) from the astrometry in these surveys, making WISE J104915.57−531906.1 the third closest system to the Sun. During spectroscopic observations with the Gemini Multi-Object Spectrograph at Gemini Observatory, an i-band acquisition image resolved it as a 1.″5 (3 AU) binary. A spectrum was collected for the primary, which I classify as L8 ± 1. The secondary is probably near the L/T transition as well given that it is only modestly fainter than the primary (Δi = 0.45 mag).