THE FIRST ULTRA-COOL BROWN DWARF DISCOVERED BY THE WIDE-FIELD INFRARED SURVEY EXPLORER
THE FIRST ULTRA-COOL BROWN DWARF DISCOVERED BY THE WIDE-FIELD INFRARED SURVEY EXPLORER
复制标题
广域红外勘测探测器发现的第一颗超冷棕矮星
DOI：
10.1088/0004-637x/726/1/30
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Katherine Rueff
中科院分区：
文献类型：
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作者：
A. Mainzer;M. Cushing;M. Skrutskie;C. Gelino;J. Kirkpatrick;Thomas H. Jarrett;F. Masci;M. Marley;D. Saumon;E. Wright;Rachael L. Beaton;M. Dietrich;P. Eisenhardt;P. Garnavich;O. Kuhn;D. Leisawitz;K. Marsh;Ian S. McLean;D. Padgett;Katherine Rueff
我们报告了宽视场红外巡天探测器（WISE）发现的第一颗新的超冷棕矮星（BD）。该天体的初步编号为WISEPC J045853.90+643451.9。大双筒望远镜上的路西弗仪器的后续光谱表明，它是一颗非常晚型的T矮星，光谱类型近似等于T9。IRTF/SpeX 0.8-2.5 μm光谱与Marley和Saumon大气模型的拟合表明，其有效温度约为600 K，大气中存在垂直混合。新的BD很容易被WISE检测到，在4.6 μm处的信噪比为1.36。目前的估计将其放置在6-10 pc的距离。这个物体代表了WISE发现的数百个附近的BD中的第一个，这些BD将适合后续观测，包括詹姆斯韦伯太空望远镜。WISE使命的两个主要科学目标之一是找到最冷，最接近太阳的恒星;这个新BD的发现证明WISE有能力实现这一目标。
We report the discovery of the first new ultra-cool brown dwarf (BDs) found with the Wide-field Infrared Survey Explorer (WISE). The object's preliminary designation is WISEPC J045853.90+643451.9. Follow-up spectroscopy with the LUCIFER instrument on the Large Binocular Telescope indicates that it is a very late-type T dwarf with a spectral type approximately equal to T9. Fits to an IRTF/SpeX 0.8–2.5 μm spectrum to the model atmospheres of Marley and Saumon indicate an effective temperature of approximately 600 K as well as the presence of vertical mixing in its atmosphere. The new BD is easily detected by WISE, with a signal-to-noise ratio of ∼36 at 4.6 μm. Current estimates place it at a distance of 6–10 pc. This object represents the first in what will likely be hundreds of nearby BDs found by WISE that will be suitable for follow-up observations, including those with the James Webb Space Telescope. One of the two primary scientific goals of the WISE mission is to find the coolest, closest stars to our Sun; the discovery of this new BD proves that WISE is capable of fulfilling this objective.