37 NEW T-TYPE BROWN DWARFS IN THE CANADA–FRANCE BROWN DWARFS SURVEY
37 NEW T-TYPE BROWN DWARFS IN THE CANADA–FRANCE BROWN DWARFS SURVEY
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加拿大-法国褐矮星调查中发现了 37 颗新 T 型褐矮星
DOI：
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发表时间：
2011
期刊：
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通讯作者：
C. Willott
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作者：
L. Albert;É. Artigau;P. Delorme;C. Reylé;T. Forveille;X. Delfosse;C. Willott
加拿大-法国褐矮星巡天是一个i′-和z′-波段巡天，由加拿大-法国-夏威夷望远镜的MegaCam完成，覆盖780 deg 2的表面。图像分析现已完成，而J带后续活动已完成90%。这次巡天确认了大约70颗T矮星候选者，其中43颗现在有近红外光谱，这些光谱是用双子座的NIRI和GNIRS以及甚大望远镜的ISAAC获得的。其中六个是以前出版的，我们在这里提出的37个新发现，所有的T矮星。它们的范围从T0到T8.5，其中四个是T7或更高的类型。这两颗新发现的T8矮星可能是薄盘年龄的高log（g）质量棕矮星。一颗T4.5矮星显示出亚金属性的迹象。我们介绍自行和近红外测光，并讨论了一些细节的最奇特/有趣的对象。
The Canada–France Brown Dwarfs Survey is an i′- and z′-band survey realized with MegaCam at the Canada–France–Hawaii Telescope that covers a surface area of 780 deg2. Image analysis is now completed while J-band follow-up campaigns are ∼90% done. The survey identified about 70 T dwarf candidates, of which 43 now have near-infrared spectra obtained with NIRI and GNIRS at Gemini and ISAAC at the Very Large Telescope. Six of these were previously published and we present here the 37 new discoveries, all T dwarfs. They range from T0 to T8.5 with four being of type T7 or later. Both newly identified T8 dwarfs are possibly high log (g) massive brown dwarfs of thin disk age. One T4.5 dwarf shows signs of sub-metallicity. We present proper motions and near-infrared photometry, and discuss about the most peculiar/interesting objects in some details.