A 1500 deg2 near infrared proper motion catalogue from the UKIDSS Large Area Survey
A 1500 deg2 near infrared proper motion catalogue from the UKIDSS Large Area Survey
复制标题
来自 UKIDSS 大面积调查的 1500 deg2 近红外自行目录
DOI：
10.1093/mnras/stt2156
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发表时间：
2013
影响因子：
4.8
通讯作者：
D. Pinfield
中科院分区：
文献类型：
--
作者：
L. Smith;P. Lucas;B. Burningham;H. Jones;R. Smart;A. Andrei;A. Andrei;A. Andrei;S. Catalan;D. Pinfield
英国红外深空巡天（UKIDSS）大面积巡天（LAS）开始于2005年，UKIDSS计划作为一个为期7年的努力，在银河系高纬度的Y， J， H和K波段进行大约4000度的巡天。该调查还包括大量的两次历元J波段观测，历元基线大于2年，以计算适当的运动。我们提出了一个1500度2的近红外固有运动表，其中包括135625个恒星源和另外88324个具有模糊形态分类的恒星源，所有的运动都在5σ水平以上。我们开发了一个自定义的运动管道，我们在这里描述。我们的目录与当前宽视场相机科学档案（WSA）第10次数据发布（DR10）目录和各种光学目录中提供的300度2子集的固有运动数据非常一致，但它受益于更大的匹配半径，因此更大的固有运动检测上限。我们提供了绝对固有运动，使用LAS星系进行相对于绝对的修正。通过使用局部二阶多项式变换，而不是WSA中的线性变换，我们可以更好地校正焦平面中的任何局部畸变，不包括UKIDSS管道消除的径向畸变。我们给出了对新褐矮星和白矮星的固有运动搜索的结果。我们讨论了在WSA DR10中与我们的星表重叠的41个源，它们的固有运动为bb0 300 mas yr - 1，其中一些是新探测到的。我们提出了15个新的候选超冷矮双星。
The United Kingdom Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) began in 2005, with the start of the UKIDSS programme as a 7 year effort to survey roughly 4000 deg2 at high Galactic latitudes in Y, J, H and K bands. The survey also included a significant quantity of two epoch J band observations, with an epoch baseline greater than 2 years to calculate proper motions. We present a near-infrared proper motion catalogue for the 1500 deg2 of the two epoch LAS data, which includes 135 625 stellar sources and a further 88 324 with ambiguous morphological classifications, all with motions detected above the 5σ level. We developed a custom proper motion pipeline which we describe here. Our catalogue agrees well with the proper motion data supplied for a 300 deg2 subset in the current Wide Field Camera Science Archive (WSA) 10th data release (DR10) catalogue, and in various optical catalogues, but it benefits from a larger matching radius and hence a larger upper proper motion detection limit. We provide absolute proper motions, using LAS galaxies for the relative to absolute correction. By using local second-order polynomial transformations, as opposed to linear transformations in the WSA, we correct better for any local distortions in the focal plane, not including the radial distortion that is removed by the UKIDSS pipeline. We present the results of proper motion searches for new brown dwarfs and white dwarfs. We discuss 41 sources in the WSA DR10 overlap with our catalogue with proper motions >300 mas yr−1, several of which are new detections. We present 15 new candidate ultracool dwarf binary systems.
最亮的纯H超冷白矮星
影响因子：
6.5
作者：
Catalán S
通讯作者：
Catalán S